It's surely possible but if it's, for example, 10% slower, that easily eats into execution time and that directly translates into a sense of "maybe it's just worth it to pay the license fee for this year" after just a few 20h place and route runs.
Of course, if it were faster, that would be a huge win for the open source implementation.
The difficult part is the place and route algorithm, not the bitstream. The proprietary ones already take quite a long time to solve: I regularly have 12-24h runs. Perhaps an open source one could do better? But it's not quite as straightforward as reverse engineering a proprietary bitstream.
I bought a 2019 Intel MBP and that was by far the worst laptop I've ever had. After just a year of use it was constantly overheating and running out of memory and disk space, barely able to open a terminal. It was so bad that I hesitated to buy the Apple silicon versions, but the good reviews convinced me and it has been going strong ever since.
[email protected]
blog.kevmo314.com
[ my public key: https://keybase.io/kevmo314; my proof: https://keybase.io/kevmo314/sigs/jKuWflZVNiTzhIe0ttNcauvsm_uNCKaCk5U7Ni6SuFk ]