Well the infrastructure is getting better on the one hand, but the main reason that people lost interest. Once the price crashed from $20K to $9K, a lot of people lost interest, cut their losses and sold off their coins, so there are fewer transactions right now. Let's see what will happen once the price starts rising again and reaches, say, the $15K level.
900 is really low, I was checking it two days ago and it was 6000. Still, I am afraid that your diagnosis (lost interest) is true and I can only hope that the cure didn't kill the patient. I hope, that is, that the interest is not lost permanently because people had been dissapointed in Bitcoin.
You can be sure if the price starts to rise again (doubles or more) there will be a new wave of the average people who has not took part in the first price raise, so there will be interest again in bitcoin...
The question is, when it will happen again, in a few weeks, months, half year or more...
Another question is if Segwit adoption will reach a certain level by that time which can help the transactions to get confirmation in time and won't cause huge backlogs in the mempool...
Or, LN will go live by that time...
Time will tell, I hope next time we will be able to handle the situation.