I have had the same line of thoughts and toyed with tracksaws and rails for some time, still weighing things up and now have thrown a rail square into the equation just to make it a more difficult decision. Currently I use a length of angle iron and a Bosch saw, carefully aligning the angle iron and clamping before rechecking alignment. Then run the saw along the edge for the cut and in many cases that is job done. But when making smaller sections following the first cut I then have to reset the angle iron square to my first cut, marking out using the 3-4-5 rule and a square before again clamping and re checking for the next cut. This works but adds a lot of time to getting the wood cut and can introduce very small errors that can throw things out later. So a track could replace my angle iron, but would be 1400/1500 mm long compared to 2000mm of very robust, heavy iron and still needs the setting out, so add a rail square to the track and now it self aligns making life easier but still not capable of cutting a batch of repetative cuts where using the track on an MFT top with no rail square would deliver. But if you now add some parallel guides to the rail square/track and at even more expense you have a good solution for cutting sheet goods with ease and capable of repetition.
So I think it comes down to how much are you willing to pay to make life easier for the type of work you are doing because as I said before, once upon a time a chippy would cut to a line with a hand saw and this is still the cheapest option although requiring the most physical effort and skill. At the other extreme a decent table saw would be in my opinion the ultimate method because set the stops and feed away and as simple as that but most expensive, has the largest footprint but no real effort from you.
