This is currently an intentional non-feature. See https://secure.phabricator.com/T5834 (and https://secure.phabricator.com/T10793 and https://secure.phabricator.com/T4385) for discussion.
Is commenting “+1” actually valuable? That is, if we imagine two states of the world:
- All comments as they are now, except “+1” and “me too” comments are likes / tokens / reactions / upvotes.
- All comments as they are now, except “+1” and “me too” comments don’t exist.
…which state of the world is preferable? I’d personally think it may actually be (2).
Of course, even if we would prefer (2), that doesn’t mean (2) is a reachable state. If we’d prefer (2) over (1), but we’d prefer (1) over the status quo, and can get to (1) by adding a “Like” button but can’t implement any product change to get to (2), that might motivate adding a “Like” button.
I haven’t personally seen too much vacuous “me too” behavior in corporate contexts, but I’ve only interacted with them briefly for the last few years. I’ve seen a bit in open source contexts. Are you working in an open source-like context (e.g., “me too” comments are coming mostly from users) or a corporation-like context (e.g., “me too” comments are coming mostly from employees), or something else?