Hi, Sid here from Terrafloww, essentially this blog and library's attempt is based on the fact that COG has emerged as the standard format used by NASA and ESA

Hi, Sid here from Terrafloww, essentially this blog and library's attempt is based on the fact that COG has emerged as the standard format used by NASA and ESA and others over the past 5 years. And there is way more data in COG and continually being produced as COGs still. So we wanted to make sure that we use the most prevalent format as efficiently and quickly as possible. We didn't try to create a new format, I believe thats best left to the large and open community itself to decide. Thanks for the question! Happy to answer more.