Generally, this is true but there are still exceptions and some of them are significant. For example, even though GAE still supports applications built on Pyth

Generally, this is true but there are still exceptions and some of them are significant. For example, even though GAE still supports applications built on Python2, they are (as far as I know) not expending effort on fixing issues in Python2 (which is fine). They are asking folks to migrate to Python3 but the issue is some of the key APIs supported in Python2 are not available in Python3. Things like memcache, search, users API are not supported on the Python3 platform. It's as if these APIs' have 'essentially been killed' for Python3. Some of these 'gaps' creates opportunities for folks like me to build some tools/features to address them or write articles about 'hacks' around it but it gets some people worried and can be seen as part of 'killed by Google' issue