Yeah, my Switch will probably chill out for a while, honestly. Unless something comes out in their eShop that looks good? Some indie games do interest me. I do have an urge to visit Zelda again, as there's a few things I'd like to try and discover.
In saying that, my brother is really enjoying Zelda. He'll still play it.
As for Mass Effect: Andromeda, I'm waiting for it to get cheaper, and I do have things to play in the meantime.
Unfortunately, yes, I do trade in games. Like you, I used to collect and hoard games, but I realize a few things...
1 - Games are expensive (especially here in Australia) and as I'm trying to save money, yet at the same time, wanting to buy particular games, I've opted for the whole "trade 'n save" option.
2 - Like I said in the first point, I'm trying to save money. So when I want to buy a game that I really want, I find the retailer selling it for the cheapest price. I go to EB Games, get them to price match. If I do trade in old games, I do it at EB, because I get a 20% extra trade in bonus, which is sometimes awesome, sometimes not.
3 - Physical copies, while cool to have, end up taking up a lot of space when you start collecting a lot. I find that if I've finished a particular game and A - haven't played it for over a year, plus B - have it uninstalled from my PS4, then I don't need it anymore and it's safe to trade away.
4 - I do make some exceptions which counter my third point... I might get rid of games that I have, that I simply don't play anymore and just am not enjoying. For example, Nioh. I really liked Nioh to begin with, but now I find it boring and repetitive... so it's a contender for me to trade away. Next, Resident Evil VII: Biohazard. I wanted to enjoy this game, and it is a good game, but I found it so frustrating that I just wasn't enjoying myself at all, and the more it frustrated me, the less I wanted to play.