I'd encourage everyone not to support colab or any other proprietary lock-in platforms. But do as you will.

I see the cons indeed, however I thought it would be really cool to continue training of a promising model in a more capable environment in just a couple of click.

Anyone who is messing around with convolutional networks is almost guaranteed to have anaconda installed. The convenience of a few less clicks in exchange for platform lock-in is exactly the devi's deal that the 3 major cloud providers have started doing.

Think really hard about the implications of enabling them. Do you want a future where Google® Colab™ is the primary way to work with data, where personal computing is dead and replaced by cloud? That's what they are striving for with this strategy.