IF I was in a military environment and or was subjecting the mags to hard use I would echo the sentiment to stick with aluminum or stainless milspec mags.
They hold up better, wont crack or break as easily and more importantly they don't swell or expand their feedlips and mag bodies when left fully loaded for periods of time.
Magpul and other plastic mags can and do swell their feedlips and bodis when left loaded...especially fully loaded for extended periods. This is likely their only serious drawback compared to steel or ally mags.
Their feedlips and bodies can also crack/break during hard use easier as well.
That said Magpuls are very reliable and of excellent design, lightweight, impervious to water and corrosion and are somewhat self lubing.
Steel and or ally milspec mags have plenty of sharp edges....Magpuls and similar are pretty much dehorned by nature...a big plus.
Being limited to low mag capacity, range use and not have your life on the line makes decision making different and affords options like cost, cool factor, preference etc to rule.
Pmags work great, are inexpensive, are very user friendly for mag changing...which the CDN AR shooter does a LOT of

are arguably cool looking.
Due to our current clown circus of legalbegal bullpooh.....running LAR mags is the only way to run 10rds legally so make an obvious good choice. They are metal and of good design, are relatively inexpensive and very tough so a great choice. Their only drawback is the short mag bodies offer lil real estate when mag changing and disappear in conventional mag pouches designed for full size mags....a major problem requiring either adding features to the mag to elongate it or puill tabs/ranger plates etc....as well as mandating mag pouches designed to work well with shorter mags.
Once mounted in the rifle the LARS work excellent and make the rifle very quick and snagfree....mag changing is reall their only downfall....otherwise they are superior in many ways and offer excellent prone or barricaded shooting ergos.
Most of us likely have a mix of Pmags and LARS...I sure do.
They are both exc mags.
If/When the sillyass nanistate ever remove the ridiculous mag restrictions on already restricted firearms deployed only on restricted ranges....full size mags can always be deneutered

That or conditions deteriorate to the point where law/order is mute.
Advice:
Buy up a half dozen or so Pmags.
Buy up the same in LAR mags. When buying LAR style mags make sure they have antitilt followers. The stainless C Products are a good go. There are others similar.
Try em out and decide. Can't go wrong with either.
You have already succeeded....you bought/built an AR and AR stuff!!
Buy more....and encourage others to do same

An AR(s) in every legitimate gun owners possession is a good thing

More the merrier.