Really true words that you've all spoken here. We much too often tend to forget what we should rationally know - the changes which are explorable for the average audience from one arranger keyboard to the next, newer version are rather marginal. So I will stick to my Roland G-1000 and my Solton MS 100 for the next couple of months.
We should never forget that we are all mainly playing music for ourselves rather than for our audience, even if we don't admit. What sometimes makes us think we need another gear is the fact that after a while we tend to get too accustomed to the sound or the handling of our instruments. Then every real musician - the writer included - is always on the run to buy something new, challenging, thrilling. Quality of sounds like piano, organ, brass, flutes has become that great that the changes are really not that striking.