That's not even a paper launch at this stage.
I will always choose the vendors that do things properly, when they're even an option.
We're starting to see open source FPGAs but they are miniscule: https://tinytapeout.com/chips/ttihp26a/tt_um_fabulous_ihp_26...
Next best thing? The mature reverse-engineered families nextpnr[0] supports.
0. https://github.com/YosysHQ/nextpnrhttps://github.com/YosysHQ...
And that's not a great option, frankly. GateMate is a strange design with major performance issues, like the lack of a dedicated clock network.