I am thinking about getting a digital piano in my apartment for convenience of practicing (and playing fun stuff), so I don't need to go to practice rooms all the time. Though I would like to get a piano that has great touch (Kawai ES8 etc.) I am worried that practicing on the digital piano regularly would do harm to my piano skills. Thus, I wonder if you could share your experience in digital pianos?

The keys of e-pianos today are weighted.

My son is professional pianist. He plays on different grand pianos and keyboards and he never complained about losing skills. I wouldn’t worry about yours especially as you say you play fun stuff.

Mind that also the keys of different pianos haven’t always the same weight and the distance of the hammers to the strings can be manually adjusted. This factor is more important:

I remember when I was about 16 my hands were more stressed on the grand piano at the conservatory and my fingers and muscles became fatigued because the different attack.

There are several out there which feel remarkably similar to acoustic pianos. Which themselves will vary quite a lot in their touch. It's almost like asking if I play XYZ upright, will it spoil my technique for when I return to ABC grand.

I use several electronics, and Roland FP2 (now 12 yrs old) feels fine still, a little light, but that's my preference.

One big advantage is the facility to use different sounds, which obviously acoustics don't offer.Different tunings can be interesting too.

Find one that you do like the feel of, and use it - a lot. It may take a few minutes to re-adjust to the acoustic after, but that's not detrimental. Get in another car, and the clutch pedal may feel different - it's no big deal. And, being experienced, you'll compensate more easily, won't you?

tl;dr

1. Yes it spoils the touch


2. I prefer electronic (still!) for other reasons most centrally alternate tunings


3. I believe it also has contributed to spoiling my ears

Yeah its a tough choice !

In more detail

I grew up on an old upright hard steinway and also a schiedmayer boudoir grand.
(And Bach and Beethoven were the only guys that mattered!)
I find the sheer physical exercise of driving wood satisfying at a level that an electronic imitation never matches… but this is not a musical aspect of the discussion.

After some twelve years of having no piano got a Casio celviano with something strange called alternate tunings — Werkmeister Kirnberger Just... and the usual equal.
And found that even standard western composers sound better:

• Bach in Werckmeister See for example
  


• Beethoven in Kirnberger


• And eastern music in just intonation sounds utterly different
  

Over time my ears have become so sensitised to this that when last I went to a classical concert I left half way because I found the current standard (ET) unbearably out of tune.

And yes I am growing older… and deafer… I suspect electronic sounds are at least part responsible