If I'm riding a tram and leave WiFi on, the continuous connection and disconnection of networks (I pay for a WiFi service with a bunch of hotspots) makes my internet useless.

If it wasn't for iOS's restrictions on some types of data usage I would never turn on WiFi on my phone.

> we can assume in the future [...] that wifi will continue to improve

WiFi has gotten faster over the years but none of the fundamental problems have been solved. Heck, WiFi routers still hijack your DNS and HTTP connections just to show a ToS or let you log in! Why is this not an adopted part of the standard?

5G is designed to use wifi when available. It's more than just new cellular radio interface and antennas. 5G connection can use 5G/LTE/WiFi simultaneously. Gibabit LTE can be used as an anchor for 5G functionality even when 5G networks is not available.

I think many people underestimate the ambition of 5G and assume that 5G is just 4G with vastly bandwidth.

Vodafone in UK very rarely bothers deploying LTE2600 unless it is a super busy place like a train station. They rely mostly on LTE800, they've started doing LTE2100 as 800 is getting so congested. But they're not even bothering with the high frequency bandwidth they already have; so I really can't see them bothering with even higher and more expensive to deploy spectrum (again, unless it is super crowded places, but LTE2600 with micro/pico cells can handle this really well now).

I also noticed the same in the US when I was roaming, even in lower manhattan there was a load of LTE700 and only sporadic higher spectrum LTE1700/2100.

I think LTE with loads of carrier aggregation will work just fine, I can't see this being much of a step. Apart from maybe better handoff between networks; but it isn't suddenly going to enable a new load of applications/devices like it is being hyped up for.

Public WIFI is also really bad from a security perspective.

It is sometimes nice if a neighbor has it open and your own modem is not working properly. Also neat, I could use it in two countries so far (Poland & Switzerland)

The initial outcry of users was quite high, as of course nobody wanted to lose bandwidth and have other on "their" network.