“With that in mind, Google and Antmicro started the FPGA Interchange format project, providing a unified framework to lower the entry barriers for developers to swiftly move from one tool to another.”
FPGA vendors have spent decades locking developers into their own closed toolchains. A shared format for the steps between synthesis and bitstream breaks that lock, at least on paper. The vendors make money from the lock. Don’t expect them to rush to adopt the key.