The more, the merrier! Although, realistically, I'm always going to use the FPGA vendor CAD tools, I'd love to have FOSS alternatives also. Kinda like the situation with compilers.https://twitter.com/oe1cxw/status/935318202942349312 …
I'd be very surprised if Mathias would provide any FOSS tool support. From my iCE40 experience I'd say he and I have very different definitions of what "complete" means wrt FPGA bit-stream documentation.
