Yup. I use it all the time just fine, and set the default format to .XLS and .DOC (not the X versions which are bogus MS bastardizations of XML anyway) and I've had no interchange problems.
Over the last decade or so, I occasionally see some Excel feature that might be switch-over-worthy, but then the whole MS setup is so much of a hassle I don't bother — NO I'm not interested in a monthly subscription, NO I'm not interested in online-only or Online-First, HELL NO I'm not interested in a Microsoft Account — I just want a package I can install locally and run when needed.
Then, the next version, LibreOffice has that feature.
So, great move by Schleswig-Holstein and also very strategic - right to repair, right to not be held over a barrel by a monopoly, etc..
Let's hope it catches on.
(And now that I'm writing about this, I realize I haven't sent LibreOffice a donation in too long, so I'm off to do that now...)