Thanks for your input! I think we have been at those points ("fat and happy") a couple of times and I noticed it, because I especially got bored myself. Luckily I have to say, we quickly got to a point again where another problem or challenge presented itself.
Also our business doesn't have huge profit margins like some of the big tech companies. So financially we're always somewhere between "it is not critical, yet", but also never reach the "100% comfortable".
Being happy is not a capitalistic goal and the capitalists will eat your lunch. Being happy and kicking ass is close enough to be harder to sabotage.