I used to... Back in the 80's...
First comp bike was a KMX125 with a Stan Stevens 175 tune...
Rode it 26 miles to work in Central London, bit of M1 ...during the week then race prep on Saturday for old school enduros and three stage trials on Sundays.. Sunday night in shed stripping down swing arm, callipers, chain, oil change, road chain and sprockets back on with number plate and "road tyres" then ride to work Monday morning...
Then got a 1987 ex works KTM350MXE 2 stroke and quickly found that getting a C90 for commuting to work was much..much cheaper and more comfortable..paid for its £200 cost in the first 6 months...
Later got an XTZ750, Transalp, BMW R100GS that had occasional trail riding on nice wide open dirt roads.. With the KTM350MX road reg with total loss lights for enduros up to 2001.. With CBX750RR, GS850 Shaft, VFR750 and ST1100 for too and from work...Then a KTM400 replaced the old 1987 KTM after a move to the Country followed by ...KTM250Exc 6days, KTM525, KTM250Exc.. All of which I've used to travel to night shifts to allow early morning trial riding on the way back home... as err indoors won't allow me to have a proper road bike anymore after an almost fatal road accident...