Earlier quoted context omitted.
With serial support, you definitely want scrollback, since you can't run GNU screen (or tmux for the hipsters) during a HW bootsequence. It absolutely seems like very conflicting decisions user-experience wise.
You can absolutely run GNU screen during a HW boot sequence through serial. See the Windows Types[1] section of the GNU screen manual. [1] https://www.gnu.org/software/screen/manual/html_node/Window-...
To make the argument that scrollback is bloat is insane if you at the same time add serial support but need scrollback for serial usage, so you use screen instead which had both serial support and scrollback.