Just for clarification you're asking can you just keep topping the plant when it keep producing new top sites?
Yeah of course you can, don't do it with autos. Waste of time.
You can take a feminised seed, chuck it under an 18/6 light schedule and veg her out indefinitely whilst topping each new top site and you'll just end up with one huge horizontal plant. Then, if you so wish you can switch it onto a 12/12 cycle and flower it out having a ridiculous amount of bud sites.
I imagine if you put a feminised XXL strain in a 100x100x200cm tent with an SF4000 or bigger on an 18/6 cycle for like 24 months it would be huge. Probably never as big as an outdoor equivalent, but probably still fun all the same.