I will not be surprised... I'd be really surprised after all this trouble, money invested, years of working and prototyping with several people and having contacts and tests with a factory that can produce for them, they'd not get to the step of producing the games. I would have been surprised if there hadn't been any disappointments and delays in the process though (for DP themselves and/or for the customers).

Though that might be true, we also know how well BOP 2.0 has been programmed, and that took quite a lot of time as well.
Things like lightshows surely won't be a problem, for the programmer has created great tools for ie. creating cool lightshows for BOP (I'm sure with having tools for later DP-games like TBL in mind). I think they've shown with BOP 2.0 that nobody has to worry about code. For what the rules will be like, that's a matter of taste: some likes mode-based games, others like games like MM, AFM, etc. Maybe they can change some rules when there's enough feedback.

I haven't played it enough to comment on the rules, the only thing I fear is how much the bowling will be used: it's nice and well made, but I think it should be used very little to keep it fun. Surely they can make a setting, so you can chose if it's 'bowling heavy' to show everyone that 'toy', or a lot less bowling, to keep it fun in the long term.
I really liked the game at the DPO (looks, graphics, layout/shots, sound) and it was fun to play even though rules were still early. The most important thing of doubt for me is the bowling toy and how much it will be used, but I have a lot of faith that it'll be a game with great ruleset (even though it takes a lot of time), a well polished game (art, sound, lights, graphics) and a great game overall.

If I'm not mistaken in BOP 2.0 the skill shot is given as bonus points at the end of the ball. Maybe it's the same with TBL?

I played it on Saterday morning at the DPO and I thought it played well. The prototypes at the DPO a few years back had problems shooting the lock (ramp) well, but this one I could shoot the ramp easily. The right ramp was a bit harder to make, but that's just a harder shot to aim right: a well aimed shot would make it easily. To me the game felt right and shots felt good.
At Saterday the rug was working well. I don't know if things had changed after that time. It was being played non-stop, every time I walked by (and so was the 'original' non-Chinese model, which I hadn't played this DPO).

JJP was way wrong the first game, Heighway the same, Dutch Pinball as well (first run), MMR, some small runs (i.e.Captain Nemo) and maybe somathing I forgot too: I think it's save to say that giving a wrong estimate did some harm to some companies and it's proven at least very very hard to estimate right, so I don't think it's strange they won't at the moment. Maybe there are some examples who have done better (AP and Spooky?), but we've seen enough times that there were given estimates again and again that turned out to be impossible, so I think it's ok that Dutch Pinball doesn't give a new estimate now.

I think Barry will really want to make things right, have tbl in production, and have a future in designing and producing pinball. Will he succeed? I sure hope so, but I really wouldn't know.

You can have doubts about their plan (I think everyone has some doubts, from little, with a lot of hope to a lot of doubts with very little hope), but I thought the 500 was the total amount of games that had to be produced? Still quite a lot have to be sold, but I think it's not right to just say that Barry said 500 games still have to be sold from this day on.
I know, it won't change the way you think, but it's not right to just quote higher numbers than were told.

You can think of it whatever you want, but that isn't a lie. Tax authorities may make exceptions though.
https://www.bvbeginnen.nl/dga-salaris/

But ontopic: I think it's great that 10 new games have been made. I hope they'll succeed and all EAs will have their games as well (eventually).

Folowing by 'Isn't that 208?' (=52x4, so you are actually saying from januari 1th, 52 weeks without a break). After that you 're using 100 games per year (so no upscaling involved during 2020) as an example for how long it will take in total from now on.
It would probably be more fair to claim it'd be in the 150 - 180 range after 2020 when all works out well and they're up to 4 a week (minus some vacation, Christmas and perhaps hicups during a year). And maybe once they produce 4 a week, in later years they'll upscale some more. We'll see. Anyways, it's good they're being produced I think.