Definitely the best tune reporting tool is a hard wired DUAL wideband serial controller. Far more accurate and reliable than a dyno jockey catering for drive in / drive out turbo Mini and 4WD diesels with an LSU4.2 mounted as single probe shoved up the jacksie and clipped to one tailpipe. By an order of magnitude.
You do basic checks after tyre or brake service, oil and filter change but just coz race flags and a drum hooked up to a PC apparently getting a tune is akin to open heart surgery. But it’s almost exactly opposite, same MO everywhere - blokes charge $500-$1000 to flash a generic tune, give it a run on the rollers, toggle diagnostic reporting, post upload check, then huzzah print an amazing laminated inkjet placard for the pool room.
In my experience that level of stock+ big WOT tuning is actually pretty poor across a range of real world driving when you evaluate it using proper equipment and objective criteria.
Yes, of course afterward you need to tell the tuner where it is crap and atrocious, perhaps dangerous. Just coz headphones and dyno time, or burnout / land speed records hanging from the wall, whatever, doesn’t mean the tune is perfect or even appropriate in the first place.
Typically with a cam fit there’s been up to a dozen pulls and maybe an hour touching steady state to confirm calibration in key areas. Whereas a full custom tune (next to one of the tuners) does take a whole day on the rollers.
In my experience the next most important thing after a tune would be a hardwired interface so you can monitor / scan and understand the important aspects of the tune on your phone/tablet any time. Once you see exactly what’s going on while driving I’ll be buggered if that doesn’t lead to tweaking the tune yourself (vs paying, explaining and watching another bloke do what you could).
In doing so you realise the brilliance and clumbsiness of the stock tune directly compared with the calibration tweaks.
Nothing beats big data across a range of conditions.