This browser port runs really great, when the game came out it was one of those that made people have to completely migrate to the next generation of hardware.
With DooM Eternal, there's actually a fully running port of DooM and DooM II inside the game and jumping into that after playing the main game for a while feels incredibly seamless. DooM (2016) and DooM Eternal feel like they took the scary shotgun ballet of the originals and added verticality and modern game mechanics to it. The only thing I think they missed an opportunity on are the dark levels that were in the originals. Not every level in the original games was a full speed dance with demons.
Case in point, there's already a pistol-only playthrough of DooM (2016) and I know people are already working on shotgun-only playthroughs of Eternal.
Not in a bad way (well, mostly. I still loathe the weapon/armor/character upgrade part of the game). There's no real mowing or herding like in the more intense levels of Doom and Doom II, but instead we get really intense fights that are cool in a different sense.
That's not the case, though. You might be somewhat disadvantaged, but not seriously.
On my first playthrough on normal difficulty I essentially only used the Super Shotgun. I can't remember using the Chainsaw for ammo, but I did use the BFG a handful of times.
The developers have even said that a goal of theirs was to make this "playstyle" (using only the SS) less viable in Doom Eternal, because it was too simple and powerful. It might have been on a NoClip podcast, I can't remember OTOH.
I've not played Eternal yet, I'm waiting for updated nvidia drivers to hit my distributions repositories.
Well, that's not my experience. I initially hated the concept of glory kills, and especially the blinking effect on staggered monsters. Even just turning the blinking effect off made the game much harder in my experience. I had to learn how to appreciate the mechanic instead. Maybe you are just a much better player than I am and could cope better with the disadvantage.
I've always viewed original Doom as more of a survival horror. People laugh now, but Doom was a genuinely scary game back when it released. Gamers nowadays obviously won't be scared by it. They also might play on lower difficulty levels or with cheatcodes. So rather than "you are stuck here with the demons", most gamers will play it as "the demons are stuck here with you", and this is what Doom 2016 reflects.
If you played the original's multiplayer at all, then you'll remember how quick and frenetic it was and how that changed the play style for the single player levels. The new games reflect that much better than Doom 3, imo.
I think they were difficult at the time because they were so novel. Modern games are novel in different ways and challenging in that novelty. Doom feels somewhat more "solved".