Just as a reading observation, many that chat here are cloud chasers. Occasionally, I hear many people talk about how their inexpensive MODs have been working just fine and that they are saving a lot of money.
Also, when watching reviews, the reviewer will mention the low watts he/she is using, and liking.
For myself, I use higher than 20 watts about 5% of the time. My bottom line is not smoking, second is flavor. It just seems that increased watts are being sold as a gimmick to keep people buying the latest and greatest to keep up with the 'joneses".
Another thing that promotes getting higher wattage devices is that new chip technology and its features are coming out that is only available with higher wattage devices.
Really, all-in-all, having higher wattage is not as necessary for staying off ciggs and getting good flavor. Actually, clouds aren't bad either with new wicking, airflow, and topper designs.
With all this in mind, my daily vaping is in the 11-18 watt area. Better toppers and builds make that easily enjoyable. 20 watts is fine.
I do have a mech and I do have a higher watt MOD, but 11-18 works for me.
Just my observations and thoughts.