I think less so than in classic D&D because the constraints are more relaxed (the combo of cantrips, and Arcana Unearthed-style slot use).
That's not really my experience. I find that PC build in 4e is more like choosing to be a light cleric or an oath paladin or whatever - you are choosing some mechanical stuff that you think (i) will be fun, and (ii) will express your PC in the way that you want.
Playing the PC is a curious mix of gameplay optimisation (like playing a hand of bridge, or being one side in a fairly stylised wargame scenario) and playing the fiction (as in, say, Dungeon World). Other RPGs I know that draw on a somewhat similar skillset are Rolemaster and Burning Wheel. (Cf, for example, Runequest or Classic Traveller, which are fairly mechanically crunchy but don't have the same optimisation element.)
Here's a self-quote from 7 years ago:
I don't think my view has changed that much.