A shared hosting with unknown hardware and configuration running on Apache:
A brand-new Apache 2.4.25-0.0+deb.sury.org~xenial+1 installed on Ubuntu 16.04 on a dedicated server:
How can I have assets loaded in parallel on the dedicated server? Apache seems to be misconfigured by default.
I should add that the screenshot is with http2 enabled. With http2 disabled the result is exactly the same but instead of long TTFB I have incrementally longer "stalled" status in Chrome's "Network" panel.