I thought about your comment, and IMO the reason some (or most) SPAs are badly built comes down to the inexperience of developers and hiring managers. They don't know much about performance, they don't measure it, they don't handle errors properly, they ignore edge cases, and some are learning as they go.

Bottom line: they build the SPA, but leave behind a terrible UX and tech debt the size of Mount Everest.

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maccard 4 days ago | parent [-]

They would have done the same thing with a MPA too though.

	▲	pyman 4 days ago \| parent [-]
		Yeah, of course. But I was thinking more from a user experience point of view. MPAs usually render pages server-side, which cuts down on frontend dependencies and expertise. That's why companies used to hire experienced engineers for the backend, and CSS/jQuery devs for the frontend. It used to make sense, but not anymore. These days, apps built with MACH architecture rely heavily on client-side code. This means companies are supposed to hire experienced engineers to architect apps on the client side but instead, they end up hiring JS devs with little to no software architecture experience. For example, I've seen SPAs that don't log any error messages from the app, which means developers have no idea what problems users are running into.