Misha, due to the inability of being able get 5 weeks away from work, My wife and I did the Frances route in three journeys. We did not even do it in sequence.
The old saying is that you 'don't know what you don't know.'
We knew that when we went for the first time, we wanted to get to Santiago and get a Compostela. We had no idea we would ever be back, thought this would be a one time thing....haha, little did we know! So year 1 we walked from Ponferrada to Santiago.
Anyway as with many others, we fell in love with Spain and the Camino, so in year 2 we walked from Burgos to Ponferrada. In year three we walked from St. Jean to Burgos, we then jumped on a bus from Burgos to Sarria and walked again from Sarria to Santiago again with alternate overnight stops from out Year 1.
Has this diminished the experience? Not in my opinion. If we had waited until we could do it all in one shot, we would still be waiting.
We do plan at some point to do the Frances all in walk. I am retired, but my wife is not yet.
Primitivo is our next planned walk this September.