You can just ignore the EULA. Nobody is coming to get you.
Sounds like yosys is good. Why is nobody using it? Why are we all hoping for Vivado instead of just using Yosys?
You can extract the timing information from Vivado. Such information is not copyrightable. You should be able to extract timing data and connectivity data from anything supported by the free version. You could also collaborate with someone with a really fast oscilloscope to gather some timing yourself, though that'll be extremely tedious.
Even if you just get the connectivity data and bitstream format and no timing, that's massively useful for less-than-high-speed projects. A single open source developer just has to make a contribution, doesn't have to do the whole thing in one go. The reverse engineering parts are often the most valuable, especially if they require access to hardware.
Sounds like yosys is good. Why is nobody using it? Why are we all hoping for Vivado instead of just using Yosys?
You can extract the timing information from Vivado. Such information is not copyrightable. You should be able to extract timing data and connectivity data from anything supported by the free version. You could also collaborate with someone with a really fast oscilloscope to gather some timing yourself, though that'll be extremely tedious.
Even if you just get the connectivity data and bitstream format and no timing, that's massively useful for less-than-high-speed projects. A single open source developer just has to make a contribution, doesn't have to do the whole thing in one go. The reverse engineering parts are often the most valuable, especially if they require access to hardware.