A little birdie at Keysight told me that the new 6000X scope is in-process at the factory. While I don't have a specific arrival time, I am guessing it won't be long now.
Initially, I will not be able to push the limits of its functionality because I do not have the right probes yet and also don't have a project yet that will push the limits. With that said - I have been browsing the manual and feel like I have so many treats to come that have nothing to do with the fast front-end of the scope. There are so many tricks that are targeted to speeding up the design and validation of a circuit. Triggering, analysis, etc.
Fundamentals: Coming from an old Tektronix TDS754C which is rather limited - the basic functions of this new scope will likely strike me as amazing. It is the little things that get used every day that I am very excited about.
Looking forward to seeing how useful zone triggering helps in the real world (3000's and 4000's have this as well)
Auto measurements and statistics.
Capture and playback through the ARB's
Serial decode and triggering from SPI and I2C
Reference waveform that I can save/recall. (technically possible on the TEK, but so painfully slow and needs a 3.5 floppy)
The PWR software is very interesting, but to take full advantage I will need a pair of DC current probes.
WATRHETR software option can do an a real-time analysis of magneto-inductive flux reacted water thermal rise characteristics.

Seriously, the day-to-day benefit of the basic functions will be very helpful immediately. The fancier 6Ghz front end, Jitter and eye analysis, etc will ensure that I have plenty of room to grow. The first year is targeted at making enough money to buy the full probe package needed to let this bird fly. Even if I find used probes, I need to count on $10-15k at some point over the next year.