they should have an option to buy the miners with the number of hash boards requested by the buyer - example, if it has 4 boards and runs at 110 th with 3300 watts - why not let the buyer specify 2 boards to get 55 th and use 1650 watts
That's a great idea as far as the buyers are concerned, but if I were Bitmain I would never attempt doing something like that unless I was having a hard time selling the gears which never seem to be the case with all the new gears they make.
The first issue I can think of is support and warranty, every item they sell = time and money to troubleshoot/replace, instead of selling 1 unit you expect them to send 2 and deal with double the issues/replacements and support tickets, the cost is also another factor. Control board, PSU, fans, case, etc. cost less when divided by 4 rather than 2 even if the PSU was smaller for the 2 boards unit, there is a base cost to everything they make, they will also need to pay more $ for the design and making different case sizes, all of that is extra trouble and extra cost, and while they can easily sell the gears as they are, they will never go out of their way and do any of that.
I imagine these gears to sell extremely fast, with all the noobs jumping in to buy the legendary 110TH miners without running the numbers, I am also sure they will release these prior to the halving to sell as many as they can, the halving is here and it will hit pretty hard, it will destroy many dreams and probably shut down a lot of farms, my plan is to wait for these gears to hit the market, then comes the halving, prices of older gears will be a lot cheaper, then buy all the S17 pros I can afford.