I think they are a victim of a less varied, more corporate business that we operate now, compared to say 15 - 25 years ago. They can only report on what is there… there is less variety amongst the hardware and operators.
The most variety available now seems to be amongst trailers and bodywork, but they aren’t very ‘■■■■’ on the front cover are they 
Plus as regards testing new lorries, there really is not a lot to pick fault in is there?
If you think back to the ‘Truck in Service’ articles that Truck Magazine did, they used to look at a “haulier” (where are they now?!), what it ran, what jobs they did and how they maintained them… who maintains their own fleet now?
Those articles then changed format, into looking at 3x operators using the same truck to compare their experiences - probably as the subjects for those articles was changing.
What would a typical article say now? … “We’ve got a yard full of Volvo/Merc/Man etc, they all do 150,000-300,000kms per year, they are all comfy to drive and they seldom break down”… that’s pretty much it!
We can perhaps look back at the early 70’s to mid 90’s as an ideal situation for publishing; more varied fleets and operators; newer, more exciting kit to write about (through the 50’s & 60’s most hauliers were making do with post-war austerity), no competition from the internet, and a rise in publishing capability and journalists (step forward Pat Kennet, George Bennett, et al).
There is also the fact that when you have been reading these mags for 30-odd years, there will not be much in the way of stuff you have not seen before.
I’m glad I can look over my cherished collection of ‘Truck’, but fear not much will alter for now… Perhaps ‘Saviem’ can start up a fanzine? - I would subscribe!