Some things never change. Cigarettes have hundreds of chemicals(That is pure B.s., btw. That list was permitted chemicals.Cigarettes would taste awful if manufacturers add all those chemicals at the max permissible dosage ).
Tobacco doesn't cause cancer (Forget about tsna and polonium stuff). Portable Asthma inhalers have PG(Yet to find one).
And then you have some inspired testing by some flavor supplier (That protocol by FA would never be published in any scientific journal.The same protocol repeated by some cardiac doctor/assistant .)
And then you have nano metal particles(Practically Absent in cigarette smoke) health effects of inhaling them is not completely known at ecig discharge quantities.
Nothing is safe when they are inhaled in to lungs save pure Air (Not even pure oxygen) and some carbon dioxide(Co2 is a major component of cigarette smoke

, besides Air).
Moderation is the Key.
Yes, Cigarette smoke has Far less
chemicals than ecig vapor .
That the eliquid ingredients are NOn-toxic(At typically used levels) is a nobrainer.When the concern is about inhaling them on a continuous basis for long periods of time other issues like lung tissue elasticity,prologed irritation comes in to play.