I agree wholeheartedly. I deliberately put a cut off date for 2013 on my collection of Australia as that spans 100 years of them. The decision was made easy by Australia Post putting out so many formats and combinations that it simply became unaffordable to maintain my collection up to date when each new issue was costing a small fortune.
I have done similar with my foreign collections with a cut off of 2010 and only concentrating on used from a few selected countries. Once the gaps on these are reduced I will consider an expansion of other countries. As per all collectors I have albums full of worldwide that gets added to if something I don't have pops up.
I too consider my collection(s) as "quite good" but again no comparison. Friends often comment that what I have must be of considerable value but funnily enough I place no fiscal value on what I have as it is something that I have always done and will never sell off. What happens once I drop off my perch is not really relevant but I suspect the usual thing will happen where it will get sold off and broken up - a shame really when so much energy gets put into it.
All you other collectors out there - OFF YOU BUMS AND GET INVOLVED! - the internet is probably the single greatest piece of technology that exists to get us connected and improve on our collections. Think back to when you were kids and negotiated the swaps with the kid down the street to get stamps neither of you had and how happy you were. The local neighborhood is now the entire globe!