Why have hubodometers gone out of favour?

[Swift]

Here is what I mean.

Not many bus companies fit these intrigueing devices to their rear wheel anymore. One of my joys of watching them as the wheel rotates has all but gone now.
Busabout and Busways still use them as do alot of semi trailers but they are not the staple they once were on private fleets. Sophisticated speedometers on today's buses might be the reason?

[boronia]

Presumably modern electronic speedos are more reliable than cable driven magnetic drums, and don't need a back-up device

[mrobsessed]

Most private buses didn't have working speedos until probably 15 years ago, so hubmeters were the way mechanics knew when to service buses.

[funbus]

we still got them on our m>a>n's!

[Randommann]

I have realised that there are Hubdometers on both ex. UTA, ex. Edwards Mark I Mercs 1818 and 1932. Did the UTA use hubdometers on their Mark Is back in the day? If not, Edwards of Armidale must have used Hubdometers in the 1990s (They don't use them anymore from what I've seen). I have read (But it might be my mind playing up) that the STA currently use some device on the fuel pump to measure the mileage of their buses.

[Off The Rails]

This isn't buses, but some truck trailer have them. 1 pair I looked at was only 0114124kms, but the trailer was about 6 years old.

Cheers!

[Doc68]

You will find more on trailers now as truck & bus speedometers are more accurate now. When I started driving buses it was a novelty to have a working speedo let alone one that was correct . For trailers it will be the only way of measuring the mileage that they do unless specifically coupled to one prime mover only (like an owner / driver unit), but when used by multiple prime movers in quick hitch situations (drop an empty trailer to be loaded & p/u a loaded trailer & GO ) mechanics can better monitor services of trailers