You may be overselling the HST+ here. It is shocking that Kubota made its reputation and that customers were perfectly happy with plain olde HST before the new Lxx40 series came out. I don't recall a single complaint from Lxx30 owners about how inefficient their HST was. I rather doubt the HST+ is a significant time saver for anyone though it certainly does avoid the three second interval when shifting range from L to M or H. Me thinks Kubota has pushed this feature as a marketing tool to justify the many thousands of bucks extra they charge for it. How many experienced Lxx30 or Plain Jane L owners are dumping their same size tractors and ponying up big bucks just to get the HST+?
HST+ is certainly an engineering advance just like position control is an advance over quarter inching valve and shuttle shift is an advance over plain manual transmission but one needs to drink orange Kool Aid to think it is more than a pricey convenience at this point. And functionally it is not nearly as important as the shuttle shift or position control advances. Show me one task that a Lxx40 can do that cannot be done by a Lxx30 or a plain L. If it is worth $5000 extra to not need to ever switch ranges on your HST then perhaps you've got too much discretionary income in play. Anyone who is actually looking for bang for their buck can put it elsewhere more profitably. A non HST+ tractor with $5000 of extra or better implements will clearly outwork the HST+ version.
dont be such a hater..