Its pretty much clear for me, I periodically go through and deal with each one (respond to each message, read each alert).
When I need a persistent one, it's usually something like "grab X from office before leaving work". In order to dismiss those, I'd have to tap it and check off the task and it disappeared.
I'd love to get that option back, but ah well I guess
I would still be able to dismiss it, just with extra steps than a swipe. Now all notifications behave the same for me.
They could have made this change in a way where you would need to long tap to force dismiss. Even if the current implementation was the default, having that option would be helpful for those that need it. I also came across complaints from people using things like HomeAssistant, where security and control notifications no longer work right.
Also if a shady app was messing with my notifications I'd just uninstall it.