Will the track receive further processing? Use an insert
Reverb, delay, compression, modulation, distortion—these are some effects that often wind up on auxiliary channels. You send some of your track to a reverb aux, and dial in as much as needed. But if the effect is meant to be used in a series and will receive further processing on the track level, it’s wiser to use the effect as insert even in parallel operation (as in, a chorus with a wet/dry control).
Worth considering. Logic Pro X instruments use both inserts and sends to achieve the fine results. There’s a reason for that.