Jesus said that because He was returning to the Father, His believers would be able to do even greater works on earth than He did (John 14: 12). Obviously, then, God didn’t intend for His miracles to stop. They were proofs of God’s existence during Jesus’ tenure on earth, and it is why they have continued since.
And I’m not talking about only amazing, supernatural events. I’m including everyday incredible instances: feeding the poor, physically and spiritually; taking care of the helpless and infirm due to age, illness, and natural disasters; concerned and compassionate help for the interests of family, friends, and prisoners; spreading the gospel, leading to the conversion of souls, etc.
Jesus, as one man spatially limited on earth, couldn’t possibly match the sheer volume of these works. He knew, though, that the omnipresence of the Holy Spirit would replace His earthly presence, and would be able to provide the power for these miracle works to His disciples all over the world.
That we’re able to do greater works than Jesus because there are more of us, is the view of most biblical scholars. It makes sense to me that this is the case. For there has never been, nor can there be, a human individual that’s more powerful than He is. It has to be that “our greater works” is in the terms of “greater number of people.”