Before standing on Ubuntu MATE 22.10 I installed and tried Debian, Ubuntu 22.04, Ubuntu 22.10, Lubuntu 22.04/10, Xubuntu 22.04, Ubuntu MATE 20 and Clear Linux.
Even though Lubuntu is faster and more lightweight, and Clear Linux seems to perform smoother on my laptop, but Ubuntu MATE is already much faster than Ubuntu and Debian themselves and is as lightweight as Xfce or even lighter - but much more beautiful.
There are some things - like flavours and also functionalities - in Ubuntu MATE that bring you to the point of decision.
It's exactly As lightweight and functional and beautiful As I would need it and recommend it to my local friends.
I eventually learnt that you can even make it faster by removing snap completely and disabling animations in MATE Tweaks. (Inform me if there are any more ways to make it lighter but not reducing much of the functionality.)
Those actually are not necessary because I'm not going to see the performance impact - You wouldn't feel much of the speed change if you already have enough resources. - But I'm going to install Ubuntu MATE on my dad's old PC so I needed to find any possibility to make Ubuntu MATE faster.
Now at the end of my story, a question pop up! Will it or can it become faster and less resource consuming in the future?
P.S. I even tried Crunchbang++ and you really can't say it's faster than Ubuntu MATE. and Lubuntu was much lighter than Crunchbang++