Oh sure, lots of things are "inconvenient" on Plan 9.
Of note for most would-be users: if you rely on a modern web browser like Firefox/Chrome, forget about it. Never going to happen.
It's important to remember that Plan 9 is fundamentally a research operating system; it's not really a "typical" environment by any stretch, and that stems largely from it being entirely network-based and distributed. A single Plan 9 system in isolation can only be so interesting. Using it on a laptop like this can be an entirely different set of problems.
If you'd like some examples of things you may face:
booting can be slow
can be intimidating to set up for some of the more important features – factotum(4) and secstore(1), new users and directories under /, etc.
cwfs is slow
hjfs is really slow
no multi-monitor support
only recently did we get a filesystem that specifically aims to be crash-safe
poor documentation, though it's been getting better
reading research papers is basically a requirement for understanding the system
security is not a priority
For me, though? I genuinely don't need much more than what's available in the base system.