HP-75C: use in 2021?

[floppy]

Thanks Max for your straight and honest message. Lets wait if anybody here has another opinion/idea.

Further comment from my side. This is another side of the story: how to justify to other family member I spent 50USD on a vintage box? all take my vintage sun glasses, my vintage rain coat, my vintage pen.. (= I can invest there), it means a real vintage box must be explained and the use described (any kind of return on invest will be explained in comparison to other raspberry pi etc. I have a t home). I know, this is hearthless.