D&D has always put a lot of emphasis on magic, magic-users delving dungeons in the hopes of finding spell scrolls, everyone else in the hopes of finding magic items. No edition has ever had more non-casting classes than casting.... 5e has the highest caster/not-caster ratio ever - you can't even compare classes, they all use spells, you have to take it down to sub-classes....
...really, the day should not be so far off when D&D admits that playing D&D just means casting spells. (Jack Chick warned us...)
I might even live to see that.
It's a strategy that worked between the end of the fad years and the start of the come-back. Many lines, realizing they had faithful fans who were collecting all the books, just put out a book a month for years. Heck, it was working for PF1 for a while.
Now, 5e is like, still selling PHs, right? Because the growth is new players trying the game, not established players delving deeper into it.