[jama211]

This starts to sound like something someone might waste time building instead of actually being productive…

[barbazoo]

In terms of earning money, but surely that's not what's it's all about, is it?

[jack_pp]

in terms of actually building something useful

[mewpmewp2]

Does everything you build must be useful? What if it's just really fun?

[MrGilbert]

If the tool brings you (you, as in: the one building it) joy and gives you a chance to let your mind float, then yes, it is useful. Just not for others. And that's fine.

[walt_grata]

Define useful and who it has to be useful to? If building it helps me improve my craft, let's me decompress and have so fun. That's useful