I know it was a big deal with 2 strokes but is it a threat on 4 strokes? I fished Lake Wedowee this past Saturday and there was a large ABA tournament going on. Water temp was 52ish and OAT below that. I have never witnessed so many boats putting the hammer down within 10-15 seconds of starting. Most were Mercurys but a bunch of SHOs as well. I cringed every time. I still let mine warm up as it is a habit and I believe a “best practice” for longevity of the motor.