To understand what is one object in memory - simply byte sequence. The variable is address to first byte of that sequence
Guys, this is great stuff, I’m going to chew this up tomorrow morning at my best.
I thought Swift had automatic memory management (garbage collection…?) I remember it from when it was released, along with advertised simplicity and the removal of some “annoyingness” of common programming languages. I would like to learn Swift but I was recommended to get into .NET better since it is open to more platforms. What would you recommend??? 
My longest AppleScript script is close to 2000 lines, I’m probably pushing the limits of it (or not optimizing my code enough LOL) but I find it simple and useful. I like how it integrates with other programs like the Finder, Adobe apps, Excel, etc., and even the use of shell scripts seals the gap of missing tools. I have few scripts that run on a schedule fetching info from the internet, moving files and folders around and saving me a bunch of time on daily tasks. I just counted 335 script files in my Script Editor folder LOL With that said, I think its time for me to learn how to build standalone apps 
The question raised by sergiorbp has been answered, but I thought I might add a quick note. In discussing this broad issue, the AppleScript Language Guide uses the term mutable, and, simply stated, mutable objects (such as a list) can share data but nonmutable objects (such as a text string) cannot. Thus, the language guide states:
“If multiple variables refer to a mutable object…, changes to the object are observable through any of the variables [emphasis mine].”
For the reason noted above, this is not directly possible, but it can be accomplished by making the text object into a mutable object:
set myVariable to {"AA"}
set aTemporalVariable to myVariable
set item 1 of aTemporalVariable to "XX"
item 1 of myVariable -->> retunrs "XX"