I abuse my commuter bicycle. It is a hybrid with Acera groupset. 3 years of year-round abuse. Snow, mud, you name it. Hills, flats. Some 20 to 100 kilometres per day. No problems. Change chain and cassette when needed. See no real need for Deore etc.

On road bike - still a novice. LBS man I trust said Sora is like MTB Acera (if not even better) and should work fine for me. I got a discount price 105 groupset, however. Luck. It works. Unfortunately, nothing to compare it with and less than 2000 kilometres on it. But I'd say it works well. Shifts, brakes, spins. All nice so far.