Also on "to be fair", JS libs have a nasty habit of either completely redoing the API, or dropping maintenance entirely and encouraging everyone to switch to the new hotness which also has a completely different API, every 6 months or so. It's a lot easier to have a nice API if you get to rewrite it on a whim and tell anyone who doesn't like it to fork off. WPF may be weird and messy, but your app will still work unchanged even now (well I think, haven't used it in a while).