Modern synthetic oils have a long service life. Maybe its becoming the new normal not to change oil unless actual mileage or an assessment of oil condition requires it. They can call it eco friendly. A bit like not changing towels and bedding in a hotel. Of course it also saves them money. But does the customer benefit?
Another thought. Its normal now to suck the old oil out through the dip stick tube rather than undoing a drain plug.
They may not get all old stuff out which mixes with the new oil making it look dirty.
I suck the oil out of dipstick hole now and change filter every 2nd oil change, I get pretty much 4 litres out - which is what I put in, and oil is just above 'full' mark on dipstick ( never moves between oil changes and I hate having oil containers with 0.2 litres left in hanging around garage ).
The best 'quick' oil check is to get a drop of oil off dipstick and rub it between thumb and finger, if it feels 'sticky' rather than 'slippery' it is time to get rid of it, also smell can play a big part - does it smell 'burnt' ?
I got a Sealey TP696 5.5 litre vacuum extractor years ago for about £50, now the cheapest I can find it is about £76 on Amazon
https://www.amazon.co.uk/gp/product/B000WZF74M/--- this 4 litre one will be OK for Jazz, Civic etc and a lot cheaper
https://www.ebay.co.uk/itm/313913252903?epid=23017014869The thing I like about the 5.5 litres on is that it has a spring lined hose ( like those springs you can get to hang curtains on ) which is much better to get down dipstick tube - where the 4 litre on ( according to picture ) has a soft clear plastic hose.
You can also use these vacuum extractors for getting oil and petrol out of lawnmowers, draining windscreen washer bottle on a car etc. etc.