Not that mixing by volume is that much of a hassle either, but by weight is cleaner. Have you ever heard of someone who switched to volume from weight? No. The other way around. Yes. Why is that?
If you personally don't like taking 1-2 minutes to wash a few syringes and some blunt needle tips (after making even up to 7 different recipes at a time in 1 mixing session)...that's OK. Keep using and throwing away pipettes, if that works better for you. I personally prefer not to tare & drip, tare & drip, etc....for each and every ingredient I'd add to a mix, one bottle at a time on the scale, when making that many different recipes in 1 session. If that means I'll wash some syringes and blunt needle tips...it's a fair trade off for me. Your method works better for you and mine does for me. It's all good in the end!
As far as having known about anyone who's switched to volume...Yes, yes I do. 2 ECF members that I've helped to learn DIY and shown the way I mix by volume. There are probably others on here, too, who just don't post about it.
You act as if I have never used volume before. I was doing it that way long before you joined this forum and I mixed hundreds of batches by volume. I have done a lot of both and have the experience to make an informed decision of what works best, at least for me and in all likely hood the majority of mixers.
I'm well aware that you've used volume before, and that you've been mixing long before I joined this forum. Making an informed decision of what works best, at least for you (as you said above)...go for it. It's the last part that seems very presumptuous, IMO, which I'm entitled to, and to post here as well.
Look, washing syringes isn't a big deal. I get it. Its still better not having to do it.
For YOU personally it's better not having to do it. Many of us don't mind it at all...when compared to tare & drip, tare & drip, etc. using pipettes that are disposable. It's just different strokes for different folks!