First there was "Oxi", now it seems every liquid detergent has latched onto "hygiene" as their latest offering du jour. So if one version of Tide or Persil liquid or pods gets laundry "hygienically clean", does that imply the other dozen or more versions don't?
Am getting fed up with it; in fact despite a ban on bringing more laundry products into this home just nabbed a job lot of older formula Cheer powder. Want something to use on odd loads taken to laundromat and for us in Maytag wringer. Could use any of my European detergents for the latter but have to scale up dosage to match higher water usage for the latter. Then there is fact SQ laundromat washers have short wash cycles, and don't do loads that long in Maytag wringer (forty minutes of thrashing about would leave one with rags...*LOL*).
It is amazing that nearly all liquid format detergents listed on EWG have "D" or "F" ratings. Each year list of chemicals in such products grows longer and longer as formulas change to incorporate this or that benefit, much of it marginal IMHO.
Back onto OP's query....
What additives or benefits are worth it in long run for one's money depends upon how one does washing, what is being washed and how. Then of course comes various personal preferences...
Enzymes have revolutionized wash day, but only are good if they are given enough time to work properly. For European washing machines with their long (and now growing increasingly so) wash cycles, enzymes had and still do have plenty of time to do their thing. With top loaders or even semi-automatics a quick wash for between five to ten minutes might not get things done. Hence early enzyme products were meant as pre-soakers. Something many products still recommend for badly soiled items.
On commercial or industrial side of things many still stick to chemicals for shifting marks and soils. They do so because over hundred or so years it has been proven acids, alkalies, bleaches and surfactants will handle a bulk of what comes with soiled laundry.
Most of you lot here already know this from adding ammonia (ammonium hydroxide) to wash water for shifting certain soils or stains in particular blood. Commercial laundries would use sodium metasilicate, sodium hydroxide (aka lye), etc...
Posted this link before, and am doing so again as it breaks down pretty much what's in Persil (American) and Tide liquid format laundry products. You can see much of things on a long and exhaustive list are either in aid of solving a problem, and or bringing perceived consumer benefit.
https://cen.acs.org/articles/95/i4/PG-Henkel-head-head-laundry.html?PageSpeed=noscript
Huge issue with liquid format laundry products is for most part (except some pods IIRC), they don't contain bleaching agents. Thus liquid detergents have a vast and bewildering list of chemicals and other additives meant to provide a solution to that problem In other words substances that will remove or lighten stains, whiten and brighten, freshen, cope with odors, sanitize, etc....
Also keep in mind with wash temps decreasing for host of reasons, one part of wash pie has been affected (thermal action). Thus the remaining portions; chemical, time, water amount must be adjusted to manage. In this instance it is "chemicals" that have been adjusted.
One reason for lengthy list of chemicals and various additives in modern laundry products, (especially liquids) is to cope with lower wash temps and less (if any) use of chlorine or even oxygen bleaches.
Years ago detergent directions stated if washing in cool or cold water that dosage amounts should be increased. You don't see that today because modern products are already stronger to cope with fact it is expected wash will be done at ambient or cold temperatures.
