Upgrading amplifiera.

Anyway most upgrades that are done to amplifiers recommended by the manufacturer do make a significant improvement. However I know some people that have spent money on upgrades only to realize that the magic that was originally there was upgraded out and were disappointed in the end but this may be a rare occurrence.

All that really matters is how well the amps work with the speakers you are using.  If you're upgrading to improve some performance aspect (for example, need more power on a difficult speaker), that makes sense.  But most times it appears that people are bored and are changing for something new, but that's not limited to amplifiers.

Why do some people who have for example a 100 watt amp, upgrade to a 200 watt amp, same make. Do they think that another 100 watts would make for a significantly better sound. The only reason I can think of for doing that is that you love your amp, bought a set of hard to drive speakers, and want to drive. 

I mean what the heck. There has to be a better sounding amp out there. 

i upgraded from the 200 wpc Ayre VX-R to the twenty series, significant change in circuit typology, operating temp, warnup time to sound optimal ( always on to 15 minutes !) and in sonics

not saying every manufacturer upgrade is this significant or pricey but IMO worth it.

i seem to have gravitated to and value gear from company that offer upgrades - ARC, Ayre, Aesthetix and Vandersteen.

i have so far upgraded the Aesthetix and Ayre, the others so far have no offerable upgrades...