My understanding on this is JJP only has the licensing rights through the end of this year. Even if they wanted to, they couldn’t after 2021 without securing the rights again. I suspect the costs would be prohibitive - let alone the production hit they would take on existing orders.
I think it’s better this way as we get more variety and choices overall, and collectors hoarding these grail machines can take pride in owning a truly limited edition.
Maybe in 15 years CGC will get a remake going - who knows?