Steps to reproduce the issue

If you look at the versioning of articles and want to compare them, Joomla shows both versions in pure HTML code.

There is a possibility of an override of:
administrator/components/com_contenthistory/tmpl/compare/compare.php
Thanks to Viktor Vogel.
Possible change from:
<?php echo htmlspecialchars($subValue->value, ENT_COMPAT, 'UTF-8'); ?>
to:
<?php echo $subValue->value; ?>

But: The "Changes" column still contains the HTML code. In J3 the text here was also formatted, which was much clearer, especially thanks to the paragraphs, when there was a lot of text.

In J3 you could switch from HTML code to text.

That was removed from the code 11 years ago
https://github.com/joomla/joomla-cms/blame/86043165758b6b48c2a4b2bc56a12ff298fd348e/administrator/components/com_contenthistory/views/compare/tmpl/compare.php#L32

Expected result

It would certainly be optimal if you could switch between HTML and formatted text in the display.