Oldschool adventure games are still being made! I still prefer them, particularly the "quest" type and, of course, with pixel graphics, but it's just not true that the genre is dead.
"FoxTail"!
"The Crimson Diamond"!
"Zniw Adventure"!
"Incantamentum"!
"Feria d'Arles" and "Bull Out of Arles"!
"Betrayed Alliance" (EGA! Text parser! And even made on SCI engine!)!
"Cascadia Quest"!
"Watch Over Christmas"!
"Rosewater"!
"Future Flashback"!
"Darkside Detective"!
"If on a Winter's Night, Four Travellers..."!
"Inspector Waffles"!
"Nine Noir Lives"!
"Born Punk"!
"Theropods"!
"Plot of the Druid"!
"Billy Masters Was Right"!
"Urban Witch Story"!
"Brassheart"!
"The Adventures of Black Hawk"!
"Gibbous: A Cthulhu Adventure"!
"Backbone"!
Even the new Leisure Suit Larrys (I rather enjoyed them despite being an asexual woman who fully excludes the possibility of personally having sex - no friggin' way!), while being way more commercial than most games on the list (heck, some of them are free, for example "Urban Witch Story", "Betrayed Alliance"...),
are, in terms of gameplay, mostly a classic quest. I agree that most of these games are distinctly niche, mostly made for a not very big community of people who just prefer the retro style. But they exists and in fact, it amazes me how much the community is alive! Retro game development is a real community, developers all the time share information about oter games. If the forum feels dead, it seems to me that it's because traditional fora are no longer the dominant form of online communication. Unfortunately for me (for example, I have technically become a member of the Polish Psychedelic Society - but I got nothing out of it, because intragroup communication is Facebook-based...
), I just feel a very strong push away from using social media - sure, I may read them (and this is how I know how alive is the retro gaming community), but I just can't force myself to create accounts because of my very strong need not to be in the majority.