Until 2021, official 5E books were a guaranteed buy for me, typically pre-ordered from my FLGS and picked up ASAP after release. (There was one exception, Acq Inc, but I eventually bought it on sale.) Since 2021, I've become very picky, waiting for reviews before making any purchase decisions. And even if I decide to buy, I'm not in a rush.
The last official book I bought was Strixhaven, a few months ago, basically as a pity purchase from a struggling game store. I do intend to buy Call of the Netherdeep, eventually; I'm also interested in Radiant Citadel, but still gonna wait for reviews. I'm not interested in purchasing MOTM, and very definitely waiting for reviews of Spelljammer and Dragonlance. (I also admit to little enthusiasm for 2024 edition, but they have two years to change my mind.)
I guess my interest in 5E 3P products has gone up a little, thinking about it, as my interest in official stuff has cooled. But what I buy in terms of physical books depends on what's in stock at the FLGS, and I only go to my FLGS once every few months anymore (picking up pre-orders used to be my excuse), so I can't really say it's shifted my 3P buying habits. I'm still a sucker for sales on DriveThruRPG and DM Guild, though.
Mind, I'm also way behind on reading the 5E material I have, both physical and digital, so that certainly isn't helping...