That is genuinely great, however it's very not common.
I think the main challenge of not using those technologies might affect talents not joining companies like yours.
It's a shame that app engine is still running on go 1.4.2,
I would have understand if it was using 1.5 (since 1.6 is still quite new) but 1.4.2 still uses the old and slow GC.
And now this...