I walked from the "new" tracks into the old station without even realizing I was supposed to be gasping for air and having a heart attack. I guess I missed the memo. I do feel bad for folks who are too old or too feeble to walk such an incredibly short distance, but for the vast majority of us this sort of brief walk should be nothing worth noticing, let alone complaining about. As stated previously, if you can't handle this then you don't stand a chance at SFO, LAX, PHX, DEN, LAS, DFW, IAH, ORD, ATL, BOS, BWI, JFK, etc. Or shopping in a mall. Or walking through a parking lot. Or retrieving the mail for that matter.
Upon arriving in Sacramento I purchased a flight back home out of San Francisco to allow for a nonstop itinerary. I rode Capitol Corridor > BART Orange > BART Yellow > SFO Red. That's four connecting trains and trams and there was plenty of walking involved. However, the only part of that whole experience that was slow and annoying enough to be memorable was the mind-numbing TSA. Everything else was fast and easy, even by my standards.