I always wondered how long it would last tbh.

I've always used source-based packages, but chromium was the one I simply dropped in favour of Firefox.

On a 16c32t / 64G machine, compiling Firefox takes ~1h with LTO and PGO, while Chromium already took 5+h in 2019 without PGO. Then they removed jumbo-build because there were some issues and kept adding code and toolchain deps (jumbo-build is a build step that merges a few hundred source files before compiling to do the header processing once, shrinking the build from 5h+ to ~1-2h). Last time I checked the build had 70k+ build steps, with the final link step easily taking 10m+ with LLD. Answering some other comments: ccache doesn't help, because every version will have some minor header changes somewhere, so basically the entire cache gets invalidated even within the same major (e.g. 151.44.22.11 to 151.44.23.28).