It's less mainstream, but there are still a lot of good adventure games released in the indie scene. The Crimson Diamond released last year got a lot of good press and is a text parser + graphical adventure game with an EGA style palette.
The Crimson Diamond is unique in that it's deliberately trying to evoke a very specific era and platform: late '80s, Sierra SCI engine. It's particularly inspired by The Colonel's Bequest. That's why it uses EGA-style graphics and parser input.
But adventure gaming never went away, it just became more and more of a niche. There are lots of high-quality amateur games, but there's been a steady tricky of high-quality "indie" commercial games since the '90s. I'd recommend Wadjet Eye Games' entire catalog: https://wadjeteyegames.com/games/
https://en.wikipedia.org/wiki/The_Crimson_Diamond