In the last several years, it is more widely supported than ever before and you can now use it on production projects.
Source: Can I Use
You do want to consider a fallback option for site visitors who are still using unsupported browsers. This is especially true on Android mobile devices where fragmentation is rampant and many older devices are not eligible for a software update.
As always, you should refer to your own website visitor statistics (using a tool like Google Analytics) to confirm how many visitors are using an unsupported browser and then make the appropriate decisions therefrom.
We’ll cover how to handle SVG browser support and fallbacks later on.