Last, I don't have the luxury of time, and as the single maintainer of 16 packages of many thousands line of code (and many other packages if you don't count tls/crypto), I'ld rather spend my free unpaid time doing something useful (adding features, bugfixing,..) for the many currents users [1], than playing the upper-bound-catch-up game. When those rare breakage happens I get notification from the wonderful stackage and usually fix it in the day or so.