At one time I used the loft before it got a proper work over. Problem is all the roof supports need air circulating round to avoid rot, so you have an opening round the eaves, and the loft reflects what’s happening outside. It ended up with just limited seasons where it was comfortable to work, in spring and autumn. Summer it was far too hot up there, likewise winter too cold. There was also the way soldered track joints could tear apart over a year due to the expansion. At last I got a proper conversion done, and it was a good room, liveable in. But the other trouble is the inward slope of the roof doesn’t allow much headroom over the layout unless you bring it closer to the middle. I ended up with a lot of microlayouts.