MySQL has a strong ecosystem model and it's a pain to switch databases. Young developers used to get a LAMP stack, Linux Apache MySql Php and that comes with MySQL. There are many products, one could say even languages, that require MySQL.

The database is the hardest component to switch and even if the company were to disappear today, it would take decades to migrate off.

Docker has none of this. It only happened a few years ago, it will be gone as quickly. It doesn't even have a strong brand name, people want kubernetes not docker, docker is merely a dependency that can be replaced.