NO lol, jailbreak will always be needed. Without jailbreak apple would have little to add to ios every year. Ios 11 alone took 5+ tweaks and implemented them (not as well as the tweak though.....no where near as nice as the tweak) If there wasn't cydia we literally wouldn't even have our app store.
People will update if they want the pay and the driving function and possibly security updates. I don't see what else would drive them to update