So true. An appropriately beautiful sanctuary beats a "worship space" anytime.
The Lex Orlando, Lex Credendi principle you mention is most evident to me in the liturgy itself.
Perhaps you go to a Traditional Latin Mass, but if you don't or live far away from one, you should make it a point to go -- even if it's an occasional visit.
We go every week. It's an hour drive vs. a 10-min. drive to the normie "New Mass."
I can see a clear difference in quality between the faith of people who go to the different liturgies.
There are a few "conservative" parishioners who go to the New Mass, but even they are adversely affected compared to their counterparts at the TLM.
I share this only because it has meant so much to me. While I'm not judgy (in a bad way), I believe in spreading traditional Catholicism more than Protestant-flavored Catholicism. Like you said, Lex Orandi, Lex Credendi.