no need for it neither 10 years ago nor now.
@Grisu, remember my advice to you to read more before you write?
People share opinions on something they know. Your opinion on something you don't know has no real value.
- Wireless N move to 5GHz was actually the biggest step forward in WiFi, advantage used today with AC/AX
- Real throughput on 5GHz was actually much higher compared to 2.4GHz due to less networks on 5GHz
- 5GHz band allowed real achievable link speeds of 300-450Mbps, very rare case for 2.4GHz band
- Wireless N on 5GHz was used everywhere and is still in use today, consumer and business sectors
- Faster WiFi means also faster connection between devices, no matter what the Internet connection speed is/was
- N900 class routers were very common, even many ISP provided ones were dual-band N routers
When people started getting in their hands the first AC devices what happened is exactly the same what happens today with the first AX devices - due to back compatibility they got connected to the existing router. No one will rush to upgrade the router immediately after getting the first new WiFi standard device. First AC devices worked on 5GHz N routers exactly the same way as first AX devices work on AC routers most of us have today. WiFi networks were mixed N and AC devices on a N router first, then people slowly upgraded to AC routers still using existing N and more new AC clients, both on 5GHz.
I had to deal with a big company recently still using HP Thin Client stations with Wireless N on 5GHz. And they are not in a rush to upgrade soon, because the 150-180Mbps throughput they get to/from each client (270-300Mbps link speeds) is exceeding few times the throughput needed for normal operations. I also still have a perfectly working iPad Air, as well as HP Probook 640 thin and light laptop, both connecting happily with 5GHz Wireless N and getting up to 200Mbps access to Internet and to other devices on the network. My DIY Weather Station (Samsung Galaxy Pad 4) is also connecting at 5GHz Wireless N. Actually, I don't use 2.4GHz since RT-N66U times. Before that I had a mixed 2.4GHz and 5GHz network on a Cisco E2500, also a dual band N router (N600 class).
The fact you have stuck to 2.4GHz for a very long time and you never needed/used/knew faster networks is actually surprising for a developed country you live in. I currently live in North America, but I'm European too and I know well what was available and what people were using years ago in Europe.