Does it make sense to put Wi-Fi 40 MHz?

Question

WiFi

I live in an apartment that is located on the side of the house (neighbors on the left, street on the right), so only 4 neighbors do interference. I hacked them and transferred them to channel 13. I took the first one.
So, will 40MHz give me Wi-Fi acceleration, or will it be worse on the contrary (devices will fall off, support with adapters)?

And can this be done with 5g?

Answer 1

5GHz works fine only without concrete walls ... then think for yourself.
Do you give out wifi right now 70-80mb?
More precisely - gives the speed at the rate of the Internet?

Answer 2

Well, if the air is clogged with a bunch of other access points, then it’s better to use 20, if, like in my case, a private house, then 40 gave me an increase in speed