Partially, much of what makes Photoshop photoshop that clones can't replicate is the actual image manipulations,layer adjustments,etc that needs to be carrier o

Partially, much of what makes Photoshop photoshop that clones can't replicate is the actual image manipulations,layer adjustments,etc that needs to be carrier over 1:1 or people will just be annoyed that it's not exactly right. Also Asm.JS (Wasm's predecessor) was born to port GAMES, games often have their own GL,etc UI's that they render themselves and then tons upon tons of gameplay logic code that runs in C/C++ (or whatever scripting language the engine supports like C#). That was the most important part initially, even if people on the outside are starting to benefit like the Figma folks that uses Wasm, kinda like GPU's were for gaming and now power a ton of modern UI and AI workloads.