Plenty of life in the Old Pi , If you use it as it was intended to do That was to learn Coding and Electronics.
Why buy a more powerful modal, when you have not mastered the first one, Why buy something then stick it in
a fancy box with a couple fans ,and not knowing how to use it . They read up what the Pi can do, then that is as fare
thy get, They learn coding in a few weeks , then they think , that is all thy need to Know,, In time there will be more
Coders than Electronic Engineers
My advice is get the bread board out and learn ,some basic electronics , It is far more fun to see your project work
There are a lot of good men on the forum who give you good advice , and point you in the right direction.
Regards BoyOh Retired Electrical / Electronic Technician
BoyOh ( Selby, North Yorkshire.UK)
Some Times Right Some Times Wrong