The big downside with this is that you can't use function pointers or addresses to static memory (which means need to be careful with e.g. string literals). Thi

The big downside with this is that you can't use function pointers or addresses to static memory (which means need to be careful with e.g. string literals). This is a pretty heavy restriction, and is too much of a limitation for a lot of cases. Not to say it's not valuable, it's great. I wouldn't exactly say it's common though.