the Holy Spirit was sent to the people present, a small number only , not all flesh, Jesus initiated the covenant, remember what Jesus compared the kingdom of heaven to, a mustard seed, the smallest of plant but grows to a tree, since Jesus came and planted this seed, the Kingdom is growing, people who believe in Jesus words and follow the GOD's will have received the HOLY SPIRIT but not everyone, when Jesus comes to establish the Millennium Kingdom, then the commandments will be in people's heart and flesh;I get the distinction, but the sending of the Spirit on Pentecost is evidence that a new covenant is in effect. Also, Hebrews states as much. And the epistles are all about how to live under such a covenant.
31 He told them another parable: “The kingdom of heaven is like a mustard seed, which a man took and planted in his field. 32 Though it is the smallest of all seeds, yet when it grows, it is the largest of garden plants and becomes a tree, so that the birds come and perch in its branches.”
This is what scripture says, it is evident that not all, far from it, follow the commandments. it is Why this is proof the new covenant is not in effect yet . A covenant is an agreement between 2 parties, many do not want to follow the commandments, there is no covenant at this time but soon, when out Lord and Savoir returns he will make this covenant with his people.
Blessings.