Heimdall is much more complicated to use than Samsung ODIN for Windows.
Samsung Odin only requires the Android USB Driver for Windows, but e. g. no *.PIT-file, no command line, because the graphical “Windows” interface makes it very easy to use.
TWRP Recovery is installed in no time, as are the /e/ OS and *.tar or *.tar.md5 files.
Measured by Market shares of the leading operating systems worldwide from Jan. 2009 to Sept. 2019 …
… Windows 79.1%
… Mac OS X 14.37%
… Linux 1.74%
… every fourth computer user could theoretically use it.
But of course our /e/ professionals remain true to ADB & Fastboot, because they can be used very universal and almost for all phones.