Alright man, I'll bite, here's my very thorough opinion on this particular semantics debate.
So roguelike genre is really popular to make games for, mostly because it's simplistic enough in interface, but potentially complex enough in mechanics to make it interesting yet relatively easy to put together a game. This has led to hundreds of roguelikes, and most of them alter the formula in some way, which is what has led to previous debates about "what makes it a roguelike", because some of them have really bent the genre pretty far, spelunky being one of the more obvious examples.
When I said the "when does it stop being a roguelike" debate was a really old debate, I was serious, it's basically the same thing as the ship of Theseus, which I'll relate to you now.
Basically there were allegedly some ancient Greeks that claimed to own Theseus's ship. Theseus (if he even really existed), was long dead, and so was his original crew, and in addition every plank and nail of the ship had been replaced at one point or another, so that it could be said that no part of the ship when it belonged to Theseus was actually still around. But they still called it Theseus's ship, you might have heard this one as "my grandfather's axe", or "George Washington's axe", the handle was replaced, then the head was replaced, but it was still his axe.
The ancient Greeks held pretty lengthy debates about whether it was still Theseus's ship, and if it was not when it stopped being his ship (or would in the future), there's been a lot of proposed solutions to the problem, and I'll share three of them now.
1. It's a sliding scale.
Basically you can say that rather than being either Roguelike, or Not Roguelike, you can say something is 70% Roguelike, and once it loses all it's last Rogelike planks, it stops being a Roguelike at all.
The drawback: This can be confusing considering all things are essentially amalgamations of lots of other things, so Spelunky might also be said to be 20% Metroid, and a variety of other things.
2. It's all about the spirit.
It's a Roguelike if people feel it's a Roguelike, even if it's lost some of the elements of a Roguelike.
The drawback: This is that you may reach a point where it loses all it's Roguelike aspects, then you're stuck wondering why you're even calling it a Roguelike at all when it's nothing like Rogue. Some people may also wind up feeling it's a Roguelike, while others disagree, such as is happening now.
3. This is all sort of silly.
"Roguelike", or "Theseus's Ship" are all just categorizations, they're tools we use to organise the world, and they have no objective meaning. The universe itself does not care what we call things, humans put these categorisations on stuff and they mean whatever we want them to mean. Now while it's definitely necessary to have some agreed on conventions for what a category includes, but bickering over the exact details is honestly a little petty. It might be better to just accept that not everyone is going to have the same definition for a word, and not worry about it so much.
The drawback: You might get involved in fewer semantics debates. You may also accidentally experience a better quality of life because of this, except when you get drawn into sardonically berating people for having semantics debates.