See here. Basically, creating a relay for the AT protocol is extremely costly and only possible for big tech companies.

Nope, a lot of software will try to bundle as much dependencies as needed by default, which makes building from source much easier. Distributions will then “unbundle” them, to keep packages reusing system libraries as much as possible

Ok, just did. Works fine.

apt install build-essential
apt build-dep emacs
wget https://ftp.gnu.org/gnu/emacs/emacs-30.1.tar.xz
tar -xf emacs-30.1.tar.xz
cd emacs-30.1
./configure —prefix=/usr/local
make
make install

Edit: forgot cd

Nah, building from source takes a few minutes unless you are building a web browser.