[Beltalowda]

I've built quite a few highly interactive webapps over the years both with and without "modern FE" (although more without), and I found the more "classic" approaches tend to be quite a bit faster than SPAs, and never really had serious problems with complexity.

I never understood this whole "it is literally impossible to do it without React" (or React alternatives) thing. I've seen it a few times now and it reminds me of 2005 when people were saying it's literally impossible to build any serious program without OOP. I don't really want to have a fight about which approach is "better"; I don't really care, maybe SPAs are better. And if you want to build SPAs then by all means do. If my boss wants me to build an SPA I'll go do it without complaining; maybe not my favourite approach but that's okay. But clearly they're not the only approach that can work well. The insistence that it is, is something I find rather off-putting.

I absolutely think you can do SPAs well; my favourite example is FastMail's web UI, it's pretty good and quite a bit of attention has gone in to various details such as the way the scrollbar/pagination works for large mailboxes. It's just hard to build a good SPA.

I borrowed quite a bit from FastMail's design when we built our own email solution a few years back with a more "classic" server-side templated approach, and I felt the UX was on par, and it was a very manageable project technically.