Since you've written that no one can change your mind:
Use Bitcoin Core v0.20.2 which doesn't include TapRoot implementations (including test networks),
but its last patch was 3 years ago so use it at your own risk.
Yeah, probably a good idea not to use it. Core prior to v0.22.0 has several DoS vulnerabilities that aren't fixed.
Unfortunately, I believe Core is one of the more optimized and maintained wallets out there. If you are using anything other than that, there is a potential that it isn't as optimized or with bugs[1].
[1]
https://blog.lopp.net/2023-bitcoin-node-performance-tests/