Manufacturing custom chips has become easier and cheaper during recent years. wafer.space is not the only one doing so.

They use a 180nm, which is meh. But still, it's an advancement towards making this accessible to everyone. Maybe in the coming years, we could see people easily doing so at home.

Also now, IMO, importance of open source hardware design has increased. 20 years ago, it wouldn't mean much if a CPU is open source or not. You could not produce a chip. And a discrete one is useless. Now it's different.