SPAs are fundamentally flawed. I am making a webapp with lots of images and media resources to download, when the user click to another page, the media on the p

SPAs are fundamentally flawed. I am making a webapp with lots of images and media resources to download, when the user click to another page, the media on the previous page are being still downloading in the background and choked the 6 connection limit. To avoid this I have to encapsulate the download queue to each "page" manually. Another issue is how browser cache 404, for SPA app, the "known" routes are stored in main.js rendered in browser, the nginx doesn't know which page is not defined, so every page is 200 and then rendered 404 in browser only, the browser would still cache the "wrong" 404 page because nginx has to serve index.html with main.js as 200 first.