It's a question that many of us ask ourselves, and the response from many around you will be often surprisingly negative.
The truth is - who knows? - there just isn't the data to say one way or another, because it's never been tested (sounds bizarre, but every attempt has shied away on the same basis - it's going to be too hard so better not try).
At the same time, you may be feeling (as I am after 10 months) - I'm just feeling better and better, why would this be a bad thing?
From an evolutionary perspective, it's difficult to argue against the idea that historically, and biologically, the human species is highly adapted to survive without carbs, indeed the bulk of our "glucose control" is about generating glucose from other stuff, and our digestive system is incredibly capable of extracting lots of nutrients from protein and fat together; yet most of the advice you will get, talks about the need for a balanced diet, with the majority player being carbs. Despite us being made up mainly of protein and fat.
There really are no perfect right answers, and we are all surprisingly unique in our response to different foods (and if you are tending toward Keto, you may find that your response to some foods will change).
Ultimately, only you will be able to answer that question, but for me, the deeper you go, the more interesting and compelling it gets (I have a laundry list of conditions that are all getting mysteriously better) and the more I want to research...
Specifically on muscle mass - yes, that is often a concern, and rightly so; we don't want to loose muscle, but my experience at least (borne out of using scales that measure this) and the science backs up, that by lowering carbs, you lower insulin over time, and that allows fat to be released for energy consumption - you just do not lose muscle at all.
Generally speaking, your body will prioritise holding on to muscle in most cases, but if insulin is up, it's very difficult to mobilise that fat.
A really good starting point, if you're interested, is Gary Taube's "The case for Keto" - which is much more balanced than the title makes it sound, it's really a result of a journalist struggling with the same question you are for a couple of decades.. at the very least, you get a thorough grounding in the pros and cons (you don't want to get into the Keto flu without some understanding, for example) and the history of our understanding of why Carbs are so influential.