My table uses content created by me and approved of by my players, are currently in the middle of campaigns using Rappan Athuk and Carrion Crown converted by me to 5th edition, are eagerly awaiting the arrival of the Scarred Lands Player's Guide we kickstarted, use monsters from both Fifth Edition Foes and the Tome of Beasts, and we have other home-brew options (such as a player coming up with an idea and me working with them to make it happen) and 3rd-party materials (like Southland Heroes, Midgard Heroes, classes Matt Mercer did up for 5th edition, and some-but-not-all-of the Book of Lost Spells) that have been approved for use but haven't actually been used yet.



So yeah, we are good with content from any source - so long as it A) interests us, and B) fits within the style of game we want to be playing (which ability draining spells don't, and that's the primary reason there are any disallowed spells from the Book of Lost Spells).



Though there was once a time when I declared as DM that no content should ever be assumed allowed in the game, and that all things no matter where they came from had to be approved by me - but that wasn't an arbitrary "get into play free" card for WotC material; it was me being fed up with the flaws in the core system of the game being exacerbated by numerous rules elements both 1st- and 3rd-party in origin. The result was actually closer to "Sword & Sorcery imprint only" than it was to "WotC only".