Once most top loaders were suds saver models. Makes like Malleys Whirlpool, Simpson, Kelvinator, etc all had suds savers.
Suds savers are not made in as many numbers now.
The reasons for this may vary from economic and hygiene.
Some people do consider them not hygienic.
The following are reasons why I would not recommend "suds save" models.
Body fats and greases from our skin, which gets on clothing by simply wearing garments,are sometimes recycled through subsequent loads.
It stands to reason that anything that is washed from our clothing (for example our underwear) will remain in the wash water.
We all might therefore ask "Why would you want to wash more garments in that water"?
I can remember visiting many houses for repairs and finding the lid of the top load suds save machine propped open with a stick or a wooden spoon.
When I asked why, I discovered the purpose of this was to allow the smell from the bowl to vacate. The smell came fom a build up of greases deposited in the outer bowl.
At the time some greases were tested to find that they consisted, in part,mostly of body fats.
I have removed the spin bowl from many suds save models to clean the the bowl. The build up of fat could be scooped up by a spatula and would sometimes fill a small icecream container.
My observations showed that the use of some 'green' friendly detergent made this worse. My conclusions here are based on diligent experience. I have been instructed that the lack of phosphates and enzymes fails to dissolve many greases and fatty residues.