No, not really. There are plenty around that can zoom in into a waveform outside the fixed timebase spacing, like the Agilent/Keysight Infiniium 8000A/9000A/80000A/90000A Series, or the Infiniium S/X/V/Z Series (not sure if the DSOX can do that). Or the LeCroy 9300/LC/WR LT/WR2LT/WP900/WR 6k(A)/WP 7k(A)/WM 8k(A)/WS400/WSXs(-B)/WRXi(-A)/WP7zi(-A)/WR6zi/WM8zi(-A)/WR8k/LM9zi/LM10zi/WS3k.
Hate to state the obvious, but I don't see the point in stating that 20000$ and up list price scopes have more bandwidth, nicer and bigger screens, more and more sophisticated features, beautiful and responsive GUI .. etc. etc. etc.. than equipment that costs 10-20 times less...
They better do for that price!!
I personally like that my screen graticule has calibrated meaning (that is why variable vertical sensitivity and variable time base on those analogue scopes was marked "UNCAL", once you use it what you see on the screen is no more quantifiable but just visible) so I personally don't need linear zoom... I appreciate that it could be useful and nice to have, but not necessary, at least not for me.
On the other hand, trigger delay limited by sampling rate and buffer size can be a problem. But that is something that comes with the how digital triggering concept is usually implemented..
I agree it could be implemented by postponing buffer acquisition by any arbitrary amount, and probably not even very hard to do, but I guess it was not important enough..
Luckily, so far I could get by by using deep memory, but agree that it could be a problem..
Right now I checked, on 500us/DIV I can zoom in to 5ns, so factor of 100000. That is a sweet spot, if you go faster or slower, you either get a limit by sample time or memory depth...
So separate hardware based trigger delay would be nice...
But as I said, didn't have a problem with it so far...
Best regards,
Sinisa