Sword of Spirit
Legend
This issue for me is being able to have a shared experience with other players and communicate in a way that makes sense. When I'm talking about healers kit dependency or long rest HD healing and nobody knows what I'm talking about, that connection is lost. They look at their books and I look at mine and the same things aren't always there.Who cares if it's the "same game"?
You had your 5E14 campaign game. You decide to turn it into and continue it as a 5E24 campaign game. There are some rules you used in the 5E14 version that don't have a matching rule in 5E24. Thus... you continue to use and adapt the 5E14 rules that you already know and bring them into the 5E24 campaign game you are continuing.
Is that the "same game"? I don't know... is it? It's your game! Call it whatever you want! No one but you cares how you identify it. If you want to call it the "same game" or now a "different game"... it doesn't matter. Does it affect this campaign game of yours (now using the 5E24 rules) what you call it? No. So identify it however the heck you wish.
Caring about the options other people have to play the game isn't just a matter of judging someone else's style. It's about whether the player base can have a shared experience or whether it is split so that newer and older players don't even know what game elements the others are talking about.