I am an expert on this, I design cooled turbine blades for a turbine engine company. There are a number of problems the ash could cause including clogging up small holes used to film cool the turbine blades, and causing thermal barrier coating (if used) to come off. The result of either would be significantly reduced turbine blade life. And yes, it could be such a significant reduction as to quickly rupture the blades and shut down the engines. Planes dropping out of the air... bad idea.

Nothing but good will come from this. It was once the best browser on the planet but it languished and was passed by many. It's hard to imagine that many users on X were using it. If they were and read about this they'll be so much happier by the change. Use Safari or Firefox on X and see what web pages are suppose to look like!