If you want to criticize someone's hard work, at least bring some supporting evidence.
This whole "my terminal app uses 250 kilobytes of disk space" means absolutely nothing and is just plain rude. By that logic, gedit is a full fledged development environment.
But when I actually tried a bunch of Electron-based terminal emulators on Mac a few years ago... they all felt awful. They were slow in ways I did not realize terminal emulators even could be, and they often had extension ecosystems that were similarly slow and also buggy as hell.
Maybe things have improved a lot, or maybe Tabby is an exception. (I'd love to hear from longtime users of Tabby here.)
When I type in a normal terminal emulator (xterm, alacritty, anything!) it feels "fast." There is no perceptible lag whatsoever between pressing a key and the character showing up on the screen.
Then I switch to a tty, and realize there's somehow even less perceptible lag.
I'm afraid to try one that uses Electron.
But totally, people who are skeptical about the use of Electron (perhaps only in some problem domains) are not necessarily being truly hateful towards anyone or anything.
It doesn't help that Terminal.app is incredibly performant and stable. Even when I found a cross-platform terminal with a nice feature set, watching it jank around while some build spams 50k lines of output would quickly burst that bubble.
Add tmux to the equation and have some output like that simultaneously occuring in multiple visible windows within a single pane, and Terminal.app will also struggle, in my experience. To get a smooth experience on Mac, I had to use iTerm2 and enable the then-experimental GPU acceleration in the alpha version.
I like to have my 'window management' for terminal stuff happen inside the terminal, so that my keybindings can live in my dotfiles and apply portably across operating systems. It's a great setup for me in terms of usability and efficiency, but it's also one that relies on great terminal performance. I was surprised to discover how much I'd taken terminal performance for granted!