I'm not suggesting any thing wrong w/ spreadsheets and notebooks etc.
For full disclosure......Personally, still use a flip phone, no smart phone/tablet/pad... at least till forced to....
Really depends on what kind of record you want to keep/need.....
For a list of cards I need, it's easier, takes up less space just
to list the Set by year and card numbers needed.....
Also, as mentioned, the site crashing or going away...
I have lost 1,000s of pics and 100s of files due to Harddrive/memory card etc crashes...
Everything has it's downs.... we can only do what is easiest and works best for each of us.....