I have no problem with the properly offline-capable apps using standards compliant web technology. I've been championing the use of PWAs to circumvent the iOS App Store for years.

To be very specific, the problematic solutions in my view tend to be those right in the middle of pure SSR and pure client. They aren't sure if they are always online or offline by default and the actual customer use cases don't seem to have been fully explored.

Did you ask the customer if a ~150ms form post to us-east-1 from their main office would be something they'd even care about? Why not? You could save an unbelievable amount of frustration if they don't care. It would take 10 minutes to set up a demo they could try if you think it's going to be a deal breaker at delivery time.

I've not once worked with a B2B customer in the banking, insurance, finance, manufacturing or retail domains who raised a concern about any of this. Only nerds on the internet seem to fantasize about the customer getting outraged at a browser navigation event or a synthetic browser benchmark score.