Pros
1. Very fast
Cons
1. Author looks unstable. (S)He may leave the project causing technical debt. Mitigation : Use the proxy in some standard way ?
2. Author's criticism of open source. Seriously ? You will not use someone's software because of his/her political opinion ?
3. Non-open source. How many of us use Windows ? Linux with binary blobs ? Fully open processors ?
4. Author seems conceited. So what ? (S)He managed to do something no one else has, shouldn't (s)he be proud ?