Over a year ago, there was a level of consternation when Web Summit announced it was moving on, quitting Dublin, heading for a new home.
It blamed the size of the RDS venue, patchy Wifi and a lack of support from authorities around transport and hotel prices.
Many did not believe this was the true reason.
Some suggested it had grown too big for its boots, become arrogant and petulant.
Others claimed it had turned its back on the people and the place that had built it into what it had become, as it had become greedy.
But a year on those claims now seem very wide of the mark.
Because most who visited this year's event in the Portuguese capital will have come away with a clear understanding of why it moved.
As the curtain falls on Web Summit 2016, the company and its co-founder. CEO Paddy Cosgrave no longer need to justify the decision (although they stopped doing so some time ago).
The event fitted in perfectly to its new home, and the team behind it carried off the extraordinarily complicated transition to a new city seamlessly, while at the same time nearly doubling the size of the attendance.
The purpose built venues, the Feira International de Lisboa and Meo Arena next door, are perfect for a conference of this size.
Modern in style, they are spacious enough to enable free movement and crucially growth.
They are properly kitted out with the necessary facilities and are located close to the metro and airport.
The city itself is also a worthy replacement to Dublin.
The people were helpful and hospitable, and the night life by all accounts was on a par with our capital city.
Although it is a bit behind where Dublin is, Lisbon has a rapidly growing and enthusiastic tech scene.
The authorities were therefore tuned into the needs, expectations and universal language spoken by the visitors from over 160 countries.
They were also ready to take advantage of the opportunities presented by having such an influential gathering in their country - something the Irish Government had been accused of overlooking in the past.
Web Summit organisers claim their early survey data suggests a majority of attendees were happy or very happy with the overall experience.
Of course, it wasn't all perfect.
Queues to access the venue, and particular parts of it were at times long, for example.
For the most part the wifi worked, but not robustly all the time - which is perhaps to be expected at a conference attended by 70,000 people.
The exhibition areas felt a little empty and devoid of high quality big budget booths like you see at other high profile international tech conferences and trade shows.
The calibre of speaker was good, but perhaps not quite as strong as previous years.
And there were other niggles too, which to be fair, the Web Summit organisers acknowledge.
But they viewed this not as a transplantation and continuation of the event from one place to another.
Instead they saw it as a new conference, which happened to share its name, style and format with something that went before.
As a result, they say they learned much from this year's experience, and will adjust accordingly.
They will have to, if they are going to allow it to become even bigger and still retain the underlying principals which have grown it into such a successful event.
At the time the move to Lisbon was announced, the initial deal was said to be three years.
Now it has emerged there is an option in there for a further two years if this year's event went well.
Although it obviously did, it is clearly too early for Web Summit to commit for a longer term.
What is clear though is that it now seems unlikely that the conference will ever return to Ireland's shore - in the mid-term at least.
Ireland's loss is Lisbon (or wherever's) gain.
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