Do you need Elements instead of RW classic? No.
Tons. No matter if you’re doing a private website just for yourself or if you’re a seasoned professional doing client work. And it’ll get better everyday.
I used RW classic for years, invested a lot (!) of money in frameworks, cms solutions and 3rd party stacks which all had a different way to name or sort their settings. That already drove me nuts.
There’ll sure be some 3rd party additions to elements, but even in it’s current state it can do more than I was able to do with RW classic + Foundry + easyCMS + lots of 3rd party stacks or even Blocs. Yes, there’ll be a learning curve, but it’s worth it.
I could’ve stayed with classic, but being forced into the terrible UI/UX from Stacks to create a website… no way. And even more so if you switch back from elements (or blocs, where I now come from) to RW classic and stacks. I can’t imagine that for the life of it.
Give it a try. You won’t be disappointed, and the forums and especially the developers offer a ton of help if you get stuck.