As a consumer, apps are a privacy concern. Firefox lets me tightly control what websites do, but apps can silently track me. They also often use notifications to increase engagement. Apps often benefit the makers more than the users.

As a maker, apps are a pain in the butt. I can get a website online in a few minutes, and it stays there forever. Every app I've made is now gone because I got tired of keeping up with app store requirements. I never made an iOS app because I won't pay 100€ for the privilege.