XIAOMI is going beyond LEAN
Unlike the customized Android builds from most other vendors, Xiaomi started out making Android ROMs before it even shipped a phone. It seems, MIUI team takes its software very seriously. Above is the release schedule for MIUI—yes, MIUI devices are getting weekly OTAs.
Many smartphones are lucky to get an OTA once or twice a year. The weekly updates probably aren’t anywhere near as big as the bi-yearly updates some other phones get, but make no mistake, in this case, bugs get fixed extremely quickly.
This obviously opens the ability for minor features, which are also added all the time.
Does all of this requires 7 day working week is debatable (perhaps) but obviously it works well. Reviewers are delirious about the new MIUI.