It's easy; buy Festool tools, buy Festool extractor... never worry about the hose fitting or not. The odd one out there is the CMS-OF, requiring the D36 hose. All the other stuff either takes the D27 inside the port (and the D36 over) or the D27 over the port.
With Festool; the more you buy, the more you can enjoy the 'system' in it. Eg the rails shared between router, jigsaw, circular saw. The clamps shared between the rails, CS50, MFT. Even the plug-It cord shared across machines.
If you buy anything else; apply tape as needed.
But even something like the Bosch GDE 16 fits the Festool D27 hose perfectly;
Maybe you should ask other manufacturers to conform to the same
One manufacturer can not set a standard. Festool can't force anybody else to follow their standard. In fact, nobody can, it is free country, well, at least most western countries are. Sort off.
Sort off, you nailed it. It seems sensorship is on the rise...
That said, Festools 27 and 36 mm hoses are more or less the standard in Germany and surrounding countries. Not because of Festool, but because bigger brands like Bosch and Metabo started to use those sizes a long time ago. And 35/36 mm is also the standard here in Europe for household vacs. Also more or less dictated by Germans, who are just the biggest suppliers of technology in Europe.
Yes, and almost all decent bicycle lights are also made to German specification, because they have the most detailed legislation on that part.