Is TWM still a viable window manager?

I have been using mainly KDE on my main desktop for a while now and have decided it is too bloated (e.g., my issue with https://unix.stackexchange.com/questions/127121/desktop-indexing-with-kde) and was thinking of switching to LXDE because it is "lighter". I realized if I want to go light, then why not just go all the way back to before "desktop environments" and switch back to TWM. I know I can run TWM on my Arch Linux system, but what I am not sure about is if it is viable. I know it is lacking so-called "features", but does it support all the core things required to run QT and GTK based programs? Is there a repository of .twmrc files? I know about http://xwinman.org/vtwm.php , but my hazy recollection is my set up was much slicker back in the day.