Nice stuff! 24-hour outages are unfavorable for payment systems. Even in the traditional banking system, we have had a few hours of downtime X times, for online banking. If more banks are deciding to go full digital, there will be more downtimes scheduled I assume. As for Lightning; it is genius, it bypasses any update time, I assume you just won't be able to close/open a pay stream during the downtime of BTC (which is already really low).