Quite a lot is possible
- I have created a Manjaro which only use 120MB RAM with GUI
- I created a frankenjaro for testing Plasma 6 using Arch kde-unstable repo
- I also compile kernels for testing
So yes a lot is possible and for as long as you know what you are doing by all means go ahead.
The reason why you see a lot of the answers don’t do - won’t work - is because quite often it is members new to Manjaro and Arch - but they have seen a wellknown tv-series about a psycotic hacker - search the net and find BlackArch and Kali - not many find Archstrike.
So while a lot is possible - some possibilities should not be explored by those new to Linux and the Arch world.
There is also a mention in BlackManjaro -- Manjaro Linux for Penetration Testing