thread Paths make up the majority of official bike lanes here
It's a pain in the arse, because you officially are supposed to get off and walk your bike across every crossing. Unofficially you do anyway, unless you are on a mountain bike that can take the hammering of jumping on/off kerbs or down/up stupidly steep ramps.
In some places it's just easier to ride on the road so you don't waste so much energy getting up to speed all the time.
It's over 30C almost every day here, so its not like anyone really uses the paths to walk on anyway.