As time goes on, I'm less worried about that kind of security -- rollbacks and such.
All right, Ethereum is growing, it may be out of its infancy. But those still remain black spots in its history and many won't rule them out as easily as you do (I don't say that you or others are wrong, history will tell).
And Vitalik still has a way too strong hand in deciding this or that.
Sure Bitcoin isn't fast enough. But if you think Ethereum will be able to handle the stress, I don't know. Remember crypto kitties?
This is imho the best explained problem.
So many come and call this and that altcoin be the next Bitcoin. But those altcoins have no (or bad) history of stress over the network.
From what I know Ethereum had such difficulties after the crypto kitties boom too.
OK, the truth is that Bitcoin had its problems too during the 2017 spam attack, but I think that we are past such problems.
In the past people claimed that Ethereum code is quite a mess. I don't know if it also got better in time. Bitcoin was always an example of better code.
Bitcoin is not perfect, I won't deny it. But claiming this or that on altcoins is unfair and useless for now. Make better ones first.
(And probably the same applies in the Ethereum vs other token/dApp platforms "war".)