Worst and only experience is the reason I moved away from programming...
25 years ago I was hired to copy a phone book list to a access database.
Access back then would create lots of garbage, so I would add 3 to 5 entries before access crashed (shitty p133 laptop with 32mb ram running windows 98.
So I made a visual basic program to add data and work around the problem.
I offered said program to the guy really cheap and would still make it better.
Did also a admin module since he had hired dozens of people and I knew he would have problems peasing the databases together.
And... Dude cancels the deal.
I get a job, 2 weeks later he calls me... Ohhh I don't know how to get all the databases together...
Me: I'm working now, the program I did solved said problem. I trew the code away. Deal with it.