Hate to say it but you're going on some really old information. Yes it's very similar to 5e at it's core, but just in the last year has added a significant amount of additional books that have made the game feel and play differently. There's more movement, Subclasses are much less "generic" and have a lot more of a specific flavor to them. Yes adding more books is to make money, but it's also to shape the game into something that is much more unique. The Monster Vault 2, Game Masters Guide, all the Campaign Builders, the upcoming Players Guide 2, Book of Blades, etc have all created a much fuller experience and far less "bland" 5e flavor.
Character building is significantly different though, particularly the lineage, heritage, background, talent system is more robust than 5e '14/'24.
Not old- but core.
My assessment is based primarily on the three main books. I never assume anytime is going to pick up all the optional material.
If some one is playing adnd 2e, I assume the core three books. Not the hole complete class books, etc. that can be over a dozen books.
I would dearly hope anything TOV put out after the core wasn’t just a reprint / rebrand of what another company did.