WordPress developers’ biggest (or most common) coding mistakes

David Bissett recently posed this question on Twitter:

https://twitter.com/dimensionmedia/status/1120702617133256704

@john-james-jacoby offered “Typos,” which probably wins for most common mistake. For most consequential, there are a lot of top contenders.

https://twitter.com/Rarst/status/1120702832485851142
https://twitter.com/philpalmieri/status/1120898858291269632
https://twitter.com/anyssaferreira/status/1120717940230426626
 
It's a thread worth following.