Not a lot of us hobby growers have that much space.
I think you may need to flower more sanderianum complex hybrid seedlings to obtain a good clone than other breeding. Other than the long petals, the flowers on sanderianum are quite hideous. Certainly not great for breeding. A lot of these negative attributes may flow through to a high proportion of seedlings.
Oh no worries- I fall in the hobby category too. Yes, once all my Chronicles plants get older, I will be hitting a show or two perhaps as a vendor, but I grow in the home in a dedicated room- and that is why I very rarely buy these complex crosses.
On sanderianum, totally agree with you- and reading your comment got me a little nostalgic.
Back in the late 80s and early 90s, the standard price for roth seedlings was $10 per inch of leaf span. That is what pretty much everyone charged at the time.
And then someone finally got sanderianum to produce seed (or so they thought- later turned out to be PEOY and a very unfortunate mistake.) When those seedlings came to market, they were $75 per inch- though if memory serves that later came down to $50 per inch.
Everyone was all caught up in the fact that sanderianum could have 3 foot petals. Little attention was being paid to the fact that in all other respects it is not exactly a show-stopping flower, although a handful of select clones are quite striking when displayed properly.
Fast forward to just over 20 years ago, and sanderianum finally started becoming reliably available in flask- and for more than rothschildianum where the selective breeding really started to pay off.
And then the last decade leading to today- a really good roth sib cross is double or more the price of a top sanderianum sib cross. Because people now know- and also because sanderianum did not prove to be the breeder everyone had hoped. Happily, the highly dominant species like roth do good things with sanderianum- but even so, it is no magic parent.
Anyhow- sorry for rambling, but I have long thought this an amusing reality. Almost as funny as how now Paph. thaianum as its own species is a hot item, but no one cared back when it was thought to be an inferior and hard to grow variety of niveum.