I tend to distrust the opinions of ‘purists’..!

Your piano teacher may be right in saying time spent on a real piano may improve your touch, but translating that to a super light action like you find on mid-range arrangers is as much work as getting the fingers strong enough for full dynamics on an acoustic.

It would be as valid to say that playing a real clavinet, or a real Rhodes, or an old Hammond would be as useful if those are the sounds you wish to feature. Each feature actions utterly different to anything else, and the limitations (and strengths!) of those actions also contribute to what sounds best played on them.

I think the real importance of playing a fine beautiful piano like you have ♥️ is to step away from the machines, and reconnect with making music with no aids, no crutches, no shortcuts! No transpose button on a piano! No auto bass. No drummer. Just 88 notes and you….

Stripping music down to this and the voice gives us a focus, and an appreciation of how much can be achieved with so little gives us perspective when it comes to turning back to the machines, and perhaps helps us rely on them less and not overuse them.

A real piano is a joy, I hope you have many, many years of joy from it. If you never played real piano before, yes, I think it will help your finger strength and dynamics. But unless you use good quality 88 note controllers for everything else too, you need to be careful that all that extra strength doesn’t overpower the action when you go back to something like an SX900 etc..

Enjoy it!