It comes down to what you are wanting to photograph.
I would suggest if your target is architectural then go the whole hog with tripod and whatever camera you want. But 'street photography' in my understanding usually means people doing things - or not. The problem here in the UK has got a whole lot worse recently with the 'terrorist suspect' thing so that a small unobtrusive camera seems to be the necessary tool. In my case I have ditched my OM4Ti in these instances for its older smaller brother the XA. Pre-set focus, pre-set aperture, auto exposure, - good most of the time - and built in back light compensation.