I can't see why the Show More content couldn't be rendered server-side, fetched with AJAX and plugged into the DOM with two lines of JS. SSR, no redirect nor refresh, progressive reveal af.
Autonomous car:
- drives pretty much on a plane
- able to stop when confused
- precise speed and direction control
- stable (i.e. does not oscillate or slide)
- uses the same environment (the actual road) for reference and "handling" (tire grip)
- anyone with IQ > 70 can drive one
Autonomous sailplane:
- flies in 3D space with pitch, roll, yaw
- has both MAX (Vne) and MIN (stall) speed, can't stop and wait
- can't even stop descending (!)
- HEAVILY influenced by wind and thermal conditions
- pretty unstable, oscillates when upset
- can not use ground as visual reference reliably
- flying one is no joke even for a human, requires serious training
For a smallish project we're using Rails + PostgreSQL with just Bootstrap for the UI. With TurboLinks and remote actions that respond with JS snippets the site feels fast enough without all the weird SPA machinery.
> European cities get by fine without cars in city centers.
Where did you get that from? Some of them, sometimes, with exceptions, with mixed success.
Certainly not Prague (which is where I live). The public transport system is absolutely fantastic, but as of now it's at 100 % capacity (locally) and the city center is still full of cars. People need to move stuff, plumbers, electricians can't haul their tools around in a bag, the streets need to remain perfectly accessible for ambulances and firetrucks.
Don't forget that most European cities are hundreds of years old, built on river banks, rocks, hills, the complete opposite of most US cities.