Just the 2 for me. 1 road & 1 mtb. I could maybe justify a second road bike so I would always have one to ride if the other was being serviced etc. I don't see much point in having half a dozen or more bikes like some people appear to do. I would only ride my favourite ones anyway. I have no use for hybrids, gravel bikes or TT bikes. I'm either road riding or hitting the mtb trails. Nothing in-between.