The whole "it's easier, quicker, less clean-up, etc." info on comparing measuring by weight to by volume or by drops...is all a matter of one's own personal experience, preference, and opinion. There's more than 1 way to DIY that will end with the same results.
I measure by volume and make my eliquids directly into the bottles they'll stay in. In fact, the only things I actually measure out are the flavorings and the Nic Base! I use just a couple syringes and 4-5 14ga. blunt needle tips to measure them. The plain PG and plain VG just get squirted and/or poured into the bottles to designated levels, depending on if I'm making a 30mL, 50mL, or 100mL bottle. It's easy-peasy, and clean-up is just a quick 1-minute or less wash for the 2 syringes and blunt needle tips!
I have, but don't use, many beakers and graduated cylinders from teaching Science for 30 years. Have a bunch of brand new ones, too, from 10mL - 2000mL size. Also have 2 scales, with the appropriate capabilities, that I could use for measuring by weight if I chose to, but see no need to, when by volume works great for me! In fact, I've told/shown 3 other people I'm helping with DIY about how I do it. Two of the 3 had even already bought the stuff for measuring "by weight", but are now also measuring by volume instead! The third one hadn't bought it yet luckily. Saved her quite a bit of money she could use for more flavorings, Nic, etc. So again...it's all about what works for each individual person.