Let me get this out of the way, Festool finally gave up in their explanations, and simply told me "Never." on my most recent query of "Will a left blade track saw ever exist?"
Now as a former Lefty, and now a full-time Righty, I have spent 4 years trying to get a (good) left blade track saw.
As a lefty, the Right blade track saws were great. They were always used to my left, and ripping or beveled rips were a breeze. But upon losing use of my left arm/leg to a viral reaction, I lost the ability to use a lot of tools. And with it, the nightmare of having a 1 day task, now take 2 weeks to do.
So ripping lumber and panels straight became impossible without a table saw, bandsaw, and a track saw.
Now, as a righty, when you rip sheet goods, which side of your body is the saw and your lumber on? If it's a 4x8 or 5x5, odds are, it's on your left side. It does work (if you have 2 hands) but has a great number of drawbacks that righties don't seem to realize while using one of the dozens of right blades track saws out there.
First off... it's on your left. You're now using your secondary hand, and for many, twisting, crossing arms, etc.
Now try doing a beveled rip at 45° (like making a wall length French cleat.
I could go on for days showing, and giving details, but the truth of the matter is that a left blade would be more beneficial for righties. And it would lose nothing in return. In fact, it could gain strength and durability being worm driven.
But at the end of the day, Festool refuses. Personally I think it's because they can't make one. I mean, why would you NOT want to sell more saws?
I mean, are people buying the (absolutely horrible) Kreg, because they think "Power tool quality, must be a Kreg"? Lol. I mean how many power tools does Kreg have? I can count on one nose how many.
So, while righties might claim "a left blade is not ____!" or whatnot, the truth is, they don't know because their only chance is using a knock-off Triton, with WEN quality, at a Makita price.
As a former lefty, I wish you all could try a left blade track saw for a while. It's completely different than the things a normal circ saw might have pro/con with.
So until then, after spending, and wasting thousands of dollars on jig, and gimmicks, the best option is still the Makita XSH03Z with adapter and Makita guide rail. (Think of all those adapters sold for $50? That's snother saw Festool didn't sell.). And even though the XSH03Z snd track adapter are the best, they're far from good, and far from an actual track saw... I have to replace the blade strip several times a year, and I reuse each strip 3 time before tossing it.
Festool... I assume you can't make one. Not making one just "because" is either a cop-out, or a bad business strategy. I know I'd happily slap down $1500 for a left blade TS 75 (even thought it's still 2x what the price should be).
So hopefully, as a long time lurker here, maybe Festool can consider being actually innovative, and make something no one else does... a GOOD left blade track saw. That's thousands of sales you're just choosing not to bank on. Weird.
And to righty track saw users. Imagine ripping with the saw and board to your right side.
It may not mean a lot for many... but for myself... it would be life-changing!