99% is not a precise figure for sure. I've found those 2 articles / surveys on that: https://www.reuters.com/article/us-ethiopia-airplane-boeing-...

"Southwest said the comments were consistent with feedback it receives and noted that “well less than 1% of customers check their aircraft type traditionally, but we do expect more customers to become aware given the current climate.” " - 99% seems close :) I frankly don't expect that to change that much - maybe it will become 95%, still overhelming majority.

Survey: https://fingfx.thomsonreuters.com/gfx/mkt/11/10298/10205/201...