The GPL is a great license. It protects the author and the rights of the users. But a younger generation has gotten used to thinking of open source as "a free thing I can use for work", rather than as the blood-sweat-and-tears of someone else who has contributed hundreds of their own hours.

If I switch my project to GPL I immediately will lose most potential contributors and a lot of users, who will start complaining about my license choice or will be forbidden by their employer from contributing to it or using it.

Corporate entities are (maybe rightly) scared of the GPL. And the rise of open source work by/in FAANG companies, etc. has meant the undermining of that license.