Note that unlike with v1.7.2, binaries for macOS M1, a tier 3 platform, are not available for this release due to infrastructure issues and the general instability of native M1 support in 1.7. (That has improved in 1.8.) Users with M1 Macs can still run the Intel 1.7 binary with Rosetta.
As a patch release, 1.7.3 contains no new features or breaking changes, only bug fixes, documentation improvements, and performance improvements. You can see the list of commits included since 1.7.2 here. We recommend that anyone currently using prior 1.7 versions upgrade to 1.7.3.
It doesn’t seem very surprising to me. M1 (etc.) is a new platform, so it takes time for all sorts of software to fully support it. Other programming languages have or have had similar issues. It’s a temporary problem, and there’s Rosetta as a backup solution.
I don’t have direct experience, though, but I’m sure many others can share theirs.
I was a bit confused that the versioninfo (and the REPL splash screen) give the release date as 2022-05-06, which was the date of the last commit. I was thinking that this version had been out for nearly a month and somehow I hadn’t noticed.