Sharing an another idea:-
"ID" is not supportable in rich content fields as of now but it should be.
In HTML we have id is an standard attribute like in below example:-
<h1 id="myHeader">My Header</h1>
Same should be in integrity as well.
Some list of current supported fields:-
At least ID should be supported in table related tags like <table>, <tr> and <td> etc.
1.) We can easily reference row with ID in code.
2.) Easy to delete or replace specific row from table in trigger code.
3.) Easy to locate specific cell value from specific row.
Feel free to add any supporting points or your thoughts.
Vielen Dank / Many Thanks,