Even should users select at random, would this result in a market share increase for alternative browsers.
Celebrating this gain early is firmly “counting the chickens before they’ve hatched”. Let’s see if users actually stick to these alternative browsers or if the market merely reciprocates what we have on desktop: lots of Chrome users.
I’d eat my hat if it turns out any different, because I’m not so naive to believe that one mandatory click-through would stand against Google’s web properties constantly asking the user to switch to Chrome.
Last time I checked, moving even more of the market under a single vendor was the opposite of competition and the consumer’s interest.