You make me look more hardcore than I am (in mount farming ofc): yes, I rotationally did lfr in mop on 30 dks to get the 530 item level required to solo madness 10 normal (back before patch, back when solo took almost till enrage, 15 mins) for blazing drake, but each week I think I only did 4-5, mop lfr was very time consuming compared to wod, no way I'd have fit 30 lfr in a single week!
This is wrong, you didn't understand what I said: there are 103 realms excluding russians NOW, they were about 200 before connections, there's no more space saved, you need more than 2 accounts to have chars on every realm.
Yes, your point stands of deleting chars, but like I said, can't lose my statistics of chars played since 2.013 in the case of the ones quoted.
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Didn't know you could make chars on russian realms, that makes the situation even worse, since there's 119 realms then, and like someone above me said, the 50 characters cap has been there since 2.004: while not a lot of people may have hit it, if you do a couple of maths you will notice how, while in vanilla it was impossible to level 50 characters to cap, with how quick levelling is now, even as a casual you might be able to level 50 chars to cap in a single year if you only do that in your wow time.
A little update in 12 years wouldn't hurt, that's my thought, but the ones with this issue are still a minority, that's why blizzard doesn't increase it, and I think 3rd account is a bit too much to cover the last 20% of the realms.