Old. VGA and DVI is quickly vanishing from computers. It's fine if a monitor offers HDMI connectivity in addition to DisplayPort but I would still use DisplayPort when connecting it to a computer. HDMI is for connecting computers to AV systems. HDMI inputs on monitors are for connecting things like game consoles which don't generally have DisplayPort because they too are designed for AV systems.
Well, sadly no...
A lot of new products still ship with D-Sub and DVI connectors, both motherboards and screens.
Random examples
www.asus.com
Supports 9th and 8th Gen Intel Core™ processors (Socket 1151); Supports DDR4 2666; 2 PCIe 3.0 x16, 2 PCIe 3.0 x1, 1 M.2 Key E for WiFi; AMD Quad CrossFireX™; Graphics Output Options: HDMI, DVI-D, D-Sub; 7.1 CH HD Audio (Realtek ALC892 Audio Codec), ELNA Audio Caps; 6 SATA3, 2 Ultra M.2 (1 x PCIe...
www.asrock.com
In the times of growing need for monitors with bigger size, improved connectivity and image quality, display specialist AOC announces the new P2 series monitors for professional users. Covering an extensive range of display sizes from 21.5" (54.7 cm), 23.8" (60.4 cm), 27" (68.6 cm) and...
www.techpowerup.com
All fairly new products that falls in either the entry-level, mid-range or "business" categories of products. Most 24" and below monitors still have at least a D-Sub connector in addition to and HDMI port, as well as maybe a DVI port. The above examples are clearly not niche products or industrial/embedded products.
Yes, HDMI was intended as an AV interface standard, but sadly HDMI is often the only digital input when it comes to a lot of budget monitors. I have no explanation as to why this is the case over DP, since there's a royalty to pay for HDMI, but not DP.
Random $100 monitor from Acer, HDMI, DVI and D-Sub.
Features an ultra-thin 21.5" Full HD (1920 x 1080) IPS display; AMD® FreeSync™ technology; 4 ms response time; 16.7 million colors; 250 Nit brightness; HDMI, DVI and VGA inputs. Shop now at the Acer Store!
store.acer.com
Basic 24" model from ViewSonic, HDMI and D-Sub only.
The ViewSonic VA2405-h is a 24” Full HD monitor with HDMI and VGA input for business or home usage. Delivering a stunning image quality with low power consumption, this monitor provides six ViewMode presets that deliver optimized screen performance in different applications. Even if used for...
www.viewsonic.com
I mean, I recently got a 27" 1500R 144Hz 1440p Acer screen, it was only supplied with a D-Sub cable... It admittedly has DP and HDMI as well, but that's how much cost cutting some companies do...
Also, I guess you forgot about USB-C and Thunderbolt as display interfaces...
The main reason we don't have many 120hz 4k monitors is because you need 2 display port cables to run them. 4k 120hz requires a 1.2ghz cable, the current gen hdmi 2.0 and display port max out around 600mhz, which is why you need 2 for these displays.
Discover the best gaming monitors. Our computer monitors for gaming have high refresh rates of up to 360 Hz, superb color ranges up to 4K HDR, and curved widescreens.
www.acer.com
Sorry, but that's BS. DisplayPort 1.4 can handle 120Hz no problem. 144Hz is a different matter, as per your example, which you clearly ignored yourself. Also, please don't mix up DP and HDMI, two very different things.
en.wikipedia.org