Most on here only have a few colonies, I would think.
Those with single colonies should be increasing to at least double that (yes, I know it's hard to do anything less than doubling when you only have one colony!) as they should realise the benefits of two colonies over the worry of a possible 100% winter loss while numerically only losing one colony; of being able to help one colony with brood or a queen cell from the other; of getting a reasonable chance of a fair crop of honey; deciding that beekeeping is not that bad and want to continue after that first (traumatic) year; have the cash to get more kit, maybe another hive, a spinner; the near family, friends and relations suddenly realise they do LIKE honey; realise they need more kit so might as well have some more bees; like proper beeswax candles; realise wood likes beeswax polish; realise the effort for running two colonies is very little more than a single; enjoy beekeeping; think they could make some mead.
Those with a few more colonies may seem to want to increase but are more interested in standing still but need to increase after winter losses or to have a couple of nucs available for making up any winter losses.
Then there is money. Nucs are going to be premium prices shortly. Honey has been expensive due to colony losses and the poor seasons this last two years. To maintain honey production, without increase, has probably needed 30% more colonies this last couple of seasons.
I think the main reasons are probably the new beeks settling in and potential nuc suppliers.
Now, I may go up one, two, or perhaps more. It will simply depend on how I feel at the time. I have two empty broods/floors/roofs assembled, ready if needed, and another two or three standard National brood boxes in the flat and a couple of old boxes that need some attention. Oh dear, I could easily more than double up, if I don't watch out....better get making standard>>>>jumbo ekes, maybe a thirty frame Dartington, just for the sheer h*ll of it.
But so easy to need to double up just to stand still. It might seem like wanting more hives for the last couple of years, but that may not have been practical for some. This winter is not over yet. I don't have a business plan, so I shall 'go with the flow' and decide when it happens.
Regards, RAB