5.5e "of Everything" book
Tasha's and Xanathar's "of Everything" books came with a lot of good supplemental material. They became the first books people would recommend to aquire after someone had already got the core rulebooks. Many things from those books got rolled into the 5.5e core rulebooks. 5th edition rolled out in 2014 and those books followed in 2017 and 2020 respectively. At first I was hopeful the three year mark for 5.5e would yield a similar book in 2027 but it seems WotC is shifting supplemental book to focus on a variety of settings and thematic seasons. Which has a strengths and weaknesses in my opinion.
Yet I am curious (especially for those who have been playing longer than I) what is 5.5e "missing" that a book like this could provide? Classes, subclasses, playable species, spells, feats, backgrounds, monsters?
For species I feel like updating Aaracroka or maybe exploring the Ardlings again would be cool. Genasi could use a 5.5e update. Kobolds and Gith are sorely being ignored atm.
For subclasses we still don't have 5.5e Oathbreaker. Martials of course are being ignored overall right now. I think Ranger and Barbarian in specific could use some love. And I will always beg and plead WotC to finally give us a dragon patron option for Warlock.