Honestly, the intent there seems easy: it's hard to tell at a glance that library A version 230 is compatible with library B version 1.2.4

However, if they both used date-based versioning, then the compatible versions would in theory have the same-ish version of 2019.12.* when compatible with each other.

For the same reasons as in tons of other comments, I also don't think this theory would work out.