There are actually five musical instruments visible in this picture. Not immediately obvious are the left-handed ukulele on the bookshelf (it’s my wife’s) and the mandolin, the case of which can just be seen on the left hand side of the picture.
And yes, these instruments get a workout. I’m teaching my daughter “While My Guitar Gently Weeps” and she uses the Blueridge tenor guitar (the one in the center) while I use the Washburn travel guitar (the one to the left) and occasionally switch up to use the ukulele. All of them are tuned like ukes, so I can swtich between them without having to learn new chords. The mandolin I originally had tuned like a uke but it went out of tune too easily, so I retuned it to the usual arrangement and am learning how to use it that way. It’s a bit of a challenge, in no small part because the frets are so tiny. I don’t exactly have monster hands, so I’m kind of amazed how anyone plays these things.
I am not a good guitar/uke player. I am sufficiently competent that if I play a song other people my recognize what it is I am trying to play, and I continue to get better, although I don’t suspect I will ever be all that good. The thing is, I don’t care. I play because I like to play and it brings me happiness to do so. It’s a good enough reason.