* Stealing:

You need a secure location to drop your bike, or you're under the risk of losing it[1]. I knew it was risky, but I never knew how easy, cheap and fast it is to steal a bike[2].

* Speed:

I used to ride above average speed on dedicated and isolated channel lanes (Ourcq), but you can't always keep that pace. Kids, families, slower users... It's risky for everyone. In town lanes are thinner and more crowded, thus I guess slower.

About sweat, how many Offices have showers ? Or maybe some water and a towel would do.

[1] or a piece of it. I had my wheel guards stolen in front of Police station.

[2] cable locks under 2cm diameter are pure fluff, guys can rip or cut them in 10 seconds. Even heavy chains won't resist some tools. Surprisingly people assume that someone cutting metal in the street must be the owner, and if they suspect he's not, why bother being harmed.