To call BBEdit a text editor is a great injustice, it is the Swiss army knife of text editors and I use it constantly.

The latest update has a major change, BBEdit is now 64-bit this comes with several advantages as the release notes describe

BBEdit is now built as a 64-bit application. This works around various reported bugs in the OS and has other beneficial side effects: the application starts more quickly on a "cold" launch; 64-bit color pickers and contextual-menu plug-ins are now available; and our customers are even more handsome and athletic than before.

Beginning with this version, you can open documents that are much larger than was previously possible. In the Before Time, documents whose in-memory size (about twice the on-disk size) exceeded roughly 1.5GB would fail to open and report an out-of-memory error, as would documents whose internal structure required generation of large quantities of syntax coloring and/or code folding information (such as complicated XML documents). Beginning with this version, you can perform many large-scale operations on very large files without running out of memory or needing to clear Undo state. Support for the Touch Bar has been added to various windows (applicable only to computers that have a Touch Bar, of course):

There are many more updates and fixes described in detail in the release notes.

BBEdit 12 requires macOS 10.11.6 ("El Capitan") or later, and is compatible with macOS 10.13 "High Sierra".

If you are using macOS 10.13 "High Sierra", please make sure that you have updated to the latest available OS version (10.13.3 or later).