A company I contract to for backend and server stuff made the jump from static HTML to client side rendering with react. They did it because the consulting comp

A company I contract to for backend and server stuff made the jump from static HTML to client side rendering with react. They did it because the consulting company they went to receommended it "because it was the future", and I am sure in no small part because that was what the consulting company specialised in. It was the worst decision they have ever made. The site they ended up with was incredibly slow, and given the relatively few pages on the site you never really make for that initial load in time saved later. It's also incredibly hard to write well, requires a special third party service to show anything in Google and is incredibly hard to manage. They don't realise this of course, and are now attempting to solve the management and initial load issues by splitting the app up into three distinct apps. It won't help.