The last time I engaged with any Steam summer sale was in 2019. Even then, I didn't even buy that much. I highly doubt I need anything. I got to save money anyway.
I've gotten to the point my game buying is: Have a list of games I'm interested in, put them on my wishlist, wait for them to drop to the price point I'm willing to pay(Which these days is around $30 for a normally $60 game) and when they get that low, I'll grab it.
Though occasionally I'll be seduced by a game that's like $5 that I have some small interest in(I bought a bunch of Flight sims on GOG's sale for like $15 for 4-5 games, because I do kinda like flight sims even if they aren't top of my list). Or when I see the ME: Legendary Edition on sale for $25 and decide that's worth it for a series I like to get all the DLC and games in one big package with some small graphics and QoL improvements to boot. When I pay $60 to fill up my car and my groceries can be $100 a week for 3 people, $15 for 4 games doesn't feel like much.
It has saved me from a lot of impulse buying, and I'll scrub the wishlists every so often. But that's just something that works for me. Most of my wishlists are games that aren't even out yet, I just want to keep track of them for when they do come out.
And yes, I know I complain about my backlog all the fucking time. I'm well aware of my hypocrisy in this manner.