It depends what your "serious" work is. I have used it to edit well over 300 million words of text, reformatting scripts to add tagging etc, large scripts of co

It depends what your "serious" work is. I have used it to edit well over 300 million words of text, reformatting scripts to add tagging etc, large scripts of complex regex to data clean (although nothing I know of beats TextCrawler for that task), even writing code in several languages - though of course a proper ide is more useful for many coding tasks. VS Code for example absolutely chokes on large files. Sublime does an ok job - but not one I can rely on for larger batch jobs. NPP excels, and I can quickly do thousands of changes on thousands of large files quickly. NPP also has many plugins (like Sublime etc), and its utility depends on them as much as the other text editors do.