conversion tool 9 to 10

Hello again, it's been a minute

I may need to upgrade my embedded tomcat application and have a couple 
of questions.

Other than the obvious javax.<servlety-stuff> -> jakarta substitutions 
what else does it change?

Can the tool "update in-place"?

I have run the tool on my "webapp" source dir, which has only a half a 
dozen servlets.  Should I also run the tool in the app source dir which 
also has some javax.servlet etc imports?  Indeed, run it over my entire 
code base?

Thanks,
rjs