DISCLAIMER: Expressed views on this blog are my own.
I tried out my "SPA Search Engine Crawler Friendliness Idea" (https://www.normansoven.com/post/spa-search-engine-crawler-friendliness-idea) and preliminary results are better than expected. Astronomical results, really. It's more work to have a search engine friendly server side page, also technically print friendly, alongside a client side website, but it's worth it if you care for organic search results.
I think going multi page for consumer facing apps is the way to go whenever you care for SEO, but serving search engines a plain page with the same info makes more sense with respect to server resources.