Sales of physical copies of games is where consoles truly shine. It's not as great as a few years ago (getting surplus steelbook games for like $10 sometimes), but you can still regularly pick up AAA games that are a handful of months old for $20 or sometimes less.

Check sites like dekudeals and psprices (steamDB is great too for making sure you're not being over charged on Steam).

It's just being a savvy consumer.

But yeah, when it comes to Nintendo hardware, the only reason to have it imo is the first party games, and those will never go on sale so you might as well just pony up. You can do the voucher thing and save $10 on each if you get two games (dunno if that's still a thing).