Hey, look, it's simple: just spend $5k on a new top-of-the-line M1 Max MacBook, then it'll be as fast as IRC was on a 133Mhz MMX Pentium 1.
Slack is great; it's like "hey, we took IRC and added inline images, now it's three orders of magnitude slower". Google Sheets is great in the same way: "hey, we took Excel and removed half the features plus now it's a few orders of magnitude slower BUT EASIER TO SHARE THINGS". Spotify is similar: "Like WinAmp, but slow, but with a subscription you can listen to most of what you want immediately and share things easily." These are in ascending order of their actual value compared to their predecessors, I guess.
Distributing the load of webapps makes sense if you've ever had to run a few thousand web servers running PHP apps, but yeah, running a framework server-side to render the page again and calling it modern is just kinda...the same thing we had before with a fresh coat of paint and more levels of abstraction.
Back in the day, we had CPAN, PEAR, and PECL. Now we have NPM and approximately 18 trillion modules. You can get stuff that does all kinds of useful types of manipulation, but under the hood some of it is still just a wrapper around some combination of zlib, FFmpeg, OpenSSL, and maybe Boost, plus TensorFlow or OpenCV (which can use FFmpeg) these days.
The amount of truly novel problems we're solving still seems low. "what Andy giveth, Bill taketh away", or I guess these days, "What Lisa giveth, Sundar taketh away"?