"Use stage-1 and higher JavaScript (modern) syntax for new projects. For old project stay consistent with existing syntax unless you intend to modernise the pro

"Use stage-1 and higher JavaScript (modern) syntax for new projects. For old project stay consistent with existing syntax unless you intend to modernise the project." That seems doesn't seem like a good idea. I can understand recommending Stage-2 and/or Stage-3, but stage-1 seems premature. Stage-1 in the TC39 process is still proposal stage that is flagged for expecting "Major" changes in the spec and possibly the syntax of the feature. Being stage-1 also is a poor guarantee that it will progress to future stages or become part of the spec. Stage-2 at least signals that the committee think its likely to eventually become part of the spec with only minor revisions.