I know this reply is quite late, but I recently purchased a 2017 15 inch Macbook Pro, and I honestly love the touchbar. It makes the device feel more premium, and adds some convenient functionality, such as emoji predictions in iMessage. I should note though, that while Apple has ended support for major updates like Montery, Ventura, and Sonoma, there are still 3 years of security updates for each version. And beyond that, well just don't do anything obviously compromising your security, and you'll be fine. The majority of security threats are targeted towards Windows anyways because they have a much larger market share. So you can still use MacOS Montery just fine for years to come.
[Edited by Moderator]