One advantage of SIWF over SIWE is that you don’t need to have 3+ different buttons / flows corresponding to different wallet providers 

Just scan a QR code, and you're authenticated

I hope that as SIWF extends to other clients, the simplicity of having a single interface is maintained

fwiw i've had a terrible experience with siwe 

it's way too complicated and requires a fairly complicated logic for managing any sort of user state, especially if you need to issue a jwt

it feels like a huge bottleneck to actually creating useful apps that you need two steps at a minimum (connect, sign)

agreed, it's painful and I've used hacks like:
- auto-prompting signature after connecting rather than requiring another click (though if you're on mobile, this doesn't work with deep links apparently...)
- using iron session — the old wagmi docs had a good example:

Building /bright-moments - minting onchain art IRL | /purple #15 | FID 129 #magikarp

Rome, Metropolitan City of Rome Capital, Italy

agreed, it's painful and I've used hacks like:
- auto-prompting signature after connecting rather than requiring another click (though if you're on mobile, this doesn't work with deep links apparently...)
- using iron session — the old wagmi docs had a good example: https://1.x.wagmi.sh/examples/sign-in-with-ethereum

Mainstream would never do in 2 steps what they use to do in 1

Connect then sign makes no sense to my cousins