The first version of Magento 2 was released 2 years ago! Many modules were made in this period, but there could have been more if everybody was using Mage2Gen. If you are not using Mage2Gen you now should take this change to save time and create more modules!
In Magento 2.2 it is no longer impossible to enable inline translate in production mode. Sometimes the merchant still wants to update several translations, this is possible with the Mage2 Module Experius Missing Translations.